SOLUTION: 9y^2-48y-36 show each step

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: 9y^2-48y-36 show each step      Log On


   

Question 404456: 9y^2-48y-36
show each step
Found 2 solutions by unlockmath, MathLover1:
Answer by unlockmath(1688) About Me  (Show Source):
You can put this solution on YOUR website!
Hello,
First we can pull out a 3 to look like this:
3(3y^2-16y-12)
Now let's factor this as:
3(3y-2)(y+6)
Make sense?
RJ
www.math-unlock.com

Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

9y%5E2-48y-36.use quadratic formula

y+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+..........a=9, b=-48 and c=-36


y+=+%28-%28-48%29+%2B-+sqrt%28+%28-48%29%5E2-4%2A9%2A%28-36%29+%29%29%2F%282%2A9%29+
y+=+%2848+%2B-+sqrt%28+2304-36%28-36%29+%29%29%2F18+
y+=+%2848+%2B-+sqrt%28+2304+%2B+1296+%29%29%2F18+
y+=+%2848+%2B-+sqrt%28+3600%29%29%2F18+
y+=+%2848+%2B-+60%29%2F18+

y1+=+%2848+%2B+60%29%2F18+
y1+=+108%2F18+
y1+=+6+

y1+=+%2848+-+60%29%2F18+
y1+=+-cross%2812%292%2Fcross%2818%293+
y1+=+-%282%2F3%29