SOLUTION: I have all my homework done except for these last couple of questions and was hoping for some help. I really detest algebra.
1. |x|6
2. √20-8x=x
Thank in advance.
Algebra.Com
Question 628587: I have all my homework done except for these last couple of questions and was hoping for some help. I really detest algebra.
1. |x|6
2. √20-8x=x
Thank in advance.
Rob
Found 2 solutions by Alan3354, Logaritmo_94:
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
1. |x|6
I don't know what that means.
---------------
2. √20-8x=x
Square both sides.
(x+5)*(x-4) = 0
etc
Answer by Logaritmo_94(1) (Show Source): You can put this solution on YOUR website!
1. |x|= 6
x=+6 and x= -6. Because of the definition of abs.
2. (sqrt(20) - 8x)^2 = x^2 . Elevate both members to the power of 2. And apply the rule of the square of a binomial.
20 - 2. sqrt(20).8x + 16x^2 =x^2. Reduce terms and elevate to the power of 2, both members again...
(-16x sqrt (20))^2 = (-15x^2+20)^2 . Then do the same as below. And the solution of the equation are: array{ x=((2 sqrt(5))/(7)), ≈0.6388765649999}and array{ x=((2 sqrt(5))/(9)), ≈0.496903995}
RELATED QUESTIONS
I was hoping to get some help I took this problem from my book, I have homework problems... (answered by KMST)
Hi. I am in 7th grade advanced math and I have questions about my homework but my teacher (answered by Alan3354)
Hi I was needing help on my math homework and i need a couple of problems solved.
and I (answered by Alan3354)
Hi my name is Lizbeth. And I have some algebra homework that i don't really understand... (answered by 10301650)
Hello, my name is Rebecca Ghisoiu. I attend Western Govorners University, an online... (answered by Theo)
I am stuck on 3 last questions for my practice exam and was hoping someone can show me... (answered by MathLover1,jorel1380)
I was doing fine on my homework in till I came to a couple of questions that I could not... (answered by solver91311)
Ok, My son came home from school today with Math homework. He is in Algebra 1 and they... (answered by Earlsdon,scott8148,samuenkadi)
Ok, My son came home from school today with Math homework. He is in Algebra 1 and they... (answered by stanbon)