SOLUTION: 1. Write the a + bi form of (7 - i)^2 (simplify)
2. R = 1/3a(x + c) solve for x
3. x^2 + 2x + 4 = 0
Algebra.Com
Question 253834: 1. Write the a + bi form of (7 - i)^2 (simplify)
2. R = 1/3a(x + c) solve for x
3. x^2 + 2x + 4 = 0
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
1. Write the a + bi form of (7 - i)^2 (simplify)
(7 - i)*(7 - i)
FOIL
49 - 7i - 7i + i^2
:
49 - 14i + (-1)
:
49 - 1 - 14i
:
48 - 14i
:
:
2. R = 1/3a(x + c) solve for x
1/3a(x + c) = R
:
Multiply both sides by 3
a(x + c) = 3R
;
Multiply whats inside the brackets by a
ax + ac = 3R
Subtract ac from both sides
ax = 3R - ac
;
Divide both sides by a
x =
:
:
3. x^2 + 2x + 4 = 0
Solve by completing the square
x^2 + 2x + __ = -4
We can complete the square with
x^2 + 2x + 1 = - 4 + 1
(x + 1)^2 = -3
x + 1 = +/-
x =
and
x =
RELATED QUESTIONS
I need help!
1. write the equation of a line whose slope is -2 and passes through... (answered by stanbon,mangopeeler07)
Write the standard equation of a circle with each given radius and center.
1. r = 4;... (answered by ewatrrr)
The question asks:
Solve each system of equations using matrices (row operations).... (answered by stanbon)
Can you please help me with these questions? I am stuck!
1. Simplify completely. 5x - (answered by edjones)
1)
a) write 1/x-3 - 1/x as single fraction in its simplest form
b) use your answer to... (answered by Alan3354)
Simplify and evaluate with all the steps shown:
a) 2a^3 x (3a^3)^2
b) (1/2)^-1... (answered by Alan3354)
1.) write f(x)=x^3+10x^2+27x+47 in the form f(x)=(x-k)q(x)+r when k=-7
2.) simplify... (answered by josgarithmetic)
solve the equation for x and express the roots in simplest a+ bi form: 3x^2=2x-1
(answered by jim_thompson5910)
1/(2(x+3))+(x/4) = (2x)/(x^2+3x+2)
Write the equation as a polynomial p(x)=0. Show that... (answered by scott8148)