Questions on Algebra: Polynomials, rational expressions and equations answered by real tutors!

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Question 213525: I need help with this problem. It has me so confused. x^4-7x^3+18x-126=0
Click here to see answer by jsmallt9(3296)

Question 213425:
and

then:

how does it do so?
Click here to see answer by Edwin McCravy(8909)

Question 212189: Hello can you please help me with this problem I have to do it over a few times. Thank you.
Explain in your own words how to factor a polynomial of the form ax2 + bx + c when a is not equal to 1. Describe both the grouping approach as well as reversing FOIL. Contrast the two methods by means of an example. Discuss which is the best approach and why.

Click here to see answer by rapaljer(4667)

Question 213744: Hi, can anyone help me with this one please;
solve for w
1 = w + (1 - w)
Click here to see answer by Theo(3464)

Question 213783: x varies directly as the square of s and inversely as t. How does x change when s is doubled? When both s and t are doubled?
Click here to see answer by Earlsdon(6287)

Question 213812: 7k+ar=-6y+r solve for r

Click here to see answer by RAY100(1637)

Question 213803: I got this far, but I don’t know how to get a each three decimal places? Would you please help me?
1.In the right triangle, find the length of the side not given; Give an exact answer and approximations the three decimal places.
12^2+12^2=C^2
144+144=288
C=sqrt(52) and three decimal places will be?
2.Guy wire, how long is a guy wire reaching from the top of a 18-ft pole to a point on the ground 12 feet from the pole?
18^2+12^2=C^2
324+144=468
C=sqrt(468) and length of the wire is ? feet?
3. Darla id building a new desk. To make sure had made a square corner, she measure 3ft. from the corner along on edge and 6ft.. How long should diagonal be between those two points if the corner is right angle?
C^2=3^2+6^2=45
Finally, take square root of both sides (you only need to consider the + answer, since lengths are negative)
So if Darla’s corner is square, she should measure ? ft between the two points?

Click here to see answer by stanbon(57387)

Question 213890: (x+y)^7
How do you work this problem?
Click here to see answer by solver91311(16897)

Question 213904: state the coefficient and exponent of 6x to the 2nd powerr
Click here to see answer by solver91311(16897)

Question 213915: Hi, Can anyone help me with this one please;
Solve for A
1 = 0.8818 - 0.0593 / A x 0.06480^2
Click here to see answer by stanbon(57387)

Question 213941: factor the polynomials.
x^2+ x-20
Click here to see answer by drj(1380)

Question 213971: "Determine the value of k in the following"
when is divided by x +2, the remainder is 1.
Click here to see answer by stanbon(57387)

Question 214005: 21 = 3
a+2 a-1
Click here to see answer by checkley77(12569)

Question 214123: Add Simplify by collecting like radical if possible.
Can you check my answer if I have right? Thanks
12sqrt(180)+7sqrt(125)
=12sqrt(36*5)+7sqrt(25*5)
=12*6sqrt(5)+7*5sqrt(5)
=72sqrt(5)+35sqrt(5)
=107sqrt(5)

Click here to see answer by jim_thompson5910(28598)

Question 214115: Please help me with find factoring. Thank you
Mutiply and simplify by factoring.
Sqrt(45)*Sqrt(250)
Sqrt(45)*(250)=11250
Sqrt(11250)= factoring will be?

Click here to see answer by thinkingeye(11)

Question 214177: How do I solve this algebra problem?
solve x(x-8)= -15
Click here to see answer by Alan3354(30993)

Question 214177: How do I solve this algebra problem?
solve x(x-8)= -15
Click here to see answer by jim_thompson5910(28598)

Question 214177: How do I solve this algebra problem?
solve x(x-8)= -15
Click here to see answer by drj(1380)

Question 214178: How is this algebra problem done?
factor p^2+12p+36
Click here to see answer by jim_thompson5910(28598)

Question 214181: Need help in this problem?
Is (-2,-2) a solution of the system
x-3y=4
3x+y=-8
Click here to see answer by jim_thompson5910(28598)

Question 214184: How is this problem done?
Is (-3,2) a solution of the system
y=3x+7
y+5x+13
Click here to see answer by drj(1380)

Question 214189: How do you solve by substitution of linear equation?
2x+y=9
y=x-3
Click here to see answer by drj(1380)

Question 214189: How do you solve by substitution of linear equation?
2x+y=9
y=x-3
Click here to see answer by Alan3354(30993)

Question 214188: How do I solve by substitution of linear equation?
x=y+2
x+3y=14
Click here to see answer by drj(1380)

Question 214187: How do I do this linear equation by solving by substitution?
y=x+3
x+y=5
Click here to see answer by drj(1380)

Question 214186: How do I solve by substitution of linear equations?
y=2

4x-2y=8
Click here to see answer by drj(1380)

Question 214185: How is this problem done?
Is (3,0) a solution of the system
2x+5y=6
x-4y=3
Click here to see answer by Alan3354(30993)

Question 214183: How is this problem done?
Is (5,0) a solution of the system
x-4y=5
2x-3y=10
Click here to see answer by Alan3354(30993)

Question 214244: I cannot come up with the right answer no matter how many times I work this problem, HELP!
These are supposed to be fractions.
3-v/v-8-9v-7/8-v
The instructions say to subtract and simplify if possible.

Click here to see answer by solver91311(16897)

Question 214295: Factor the trinominal
2(m+p)^2-7(m+p)-30
Click here to see answer by solver91311(16897)

Question 214295: Factor the trinominal
2(m+p)^2-7(m+p)-30
Click here to see answer by drj(1380)

Question 214379: How do I solve by addition method
3x-5y=5
x+2y=9
Click here to see answer by stanbon(57387)

Question 214367: Can anyone help me with this problem? Find b and c so that the parabola y = -14 x^2 + b x + c has vertex (6 , 0 ).
Click here to see answer by Theo(3464)

Question 214375: How do I solve by substitution?
2x+y=5
4x-3y=-5
Click here to see answer by Alan3354(30993)

Question 214382: How do I solve by addition method?
4x-3y=10
5x+6y=-7
Click here to see answer by Alan3354(30993)

Question 214381: How do I solve by addition method?
2x+3y=6
x+2y=5
Click here to see answer by Alan3354(30993)

Question 214376: How do I solve this problem by substitution?
2x+y=0
3x-2y=7
Click here to see answer by Alan3354(30993)

Question 214384: Factor completly, or state the polynomial is prime.

Click here to see answer by Alan3354(30993)

Question 21257: How would I simplify this problem?
-(3-x)=
i keep coming up with different answers that don't reflect
what's in the book. thanks
Click here to see answer by DRichardson(63)

Question 214397: How do I solve this linear equation
Is (5,0) a solution of the system
x-4y=5
2x-3y=10
Click here to see answer by stanbon(57387)

Question 214399: How do I solve this by graphing
x=2
y=-1
Click here to see answer by stanbon(57387)

Question 214398: How do I solve this problem by graphin
x+y=3
2x+y=1
Click here to see answer by Alan3354(30993)

Question 214414: how to factor 16x^4-1
Click here to see answer by jim_thompson5910(28598)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 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