Sunday

December 21, 2014

December 21, 2014

Posted by **Melissa** on Sunday, October 2, 2011 at 2:28am.

1. 8a^2-2ab-21b^2

2. 6m^2-90m+324

3.5x(2-x)+4x(2x-5)-(3x-4)

4. 9(y-1)^2-25

5. 3x^2-27(2-x)^2

- Math -
**Steve**, Sunday, October 2, 2011 at 11:59pm4. 9(y-1)^2 - 25 = [3(y-1)]^2 - 5^2

= [3(y-1)+5]*[3(y-1)-5]

= (3y-2)(3y-8)

5. 3x^2 - 27(2-x)^2

= 3[x^2 - 9(2-x)^2]

= 3[x^2 - [3(2-x)]^2]

= 3[(x+3(2-x)][x-3(2-x)]

= 3(x + 6 - 3x)(x - 6 + 3x)

= 3(-2x+6)(4x-6)

= 12(3-x)(2x-3)

It's late -- someone else do 1-3

**Answer this Question**

**Related Questions**

math - Hi, I need help with these questions: factor 6m^2-90m+324 8a62-2ab-21b^2 ...

math - what would it be if you took 324.76 and tryed to make it notation and in ...

Algebra - Factor 2ab(c-d)+10d(c-d) I would like to know how to do this. Thanks...

Alegbra - Factor completely. Remember to look first for a common factor. Check ...

Alegbra - Factor completely. Remember to look first for a common factor. Check ...

Gr. 10 Math! - Factor by Grouping. PLEASE SHOW ME THE STEPS! 1.) 8a^2+12ab-3b^2-...

Gr.10 Math!!!! urgent - Factor by Grouping. PLEASE SHOW ME THE STEPS! 1.) 8a^2+...

Math - 1.3x^2+17x+10 2.5y^8-125 3.a^2-2ab-15b^2 *Please help me.You have to ...

factor - Factor 3x^2 - 4x + 1 these aswell x^2 - 16 x^2– 6x + 9 a^2- 2ab + b^ 2 ...

Algebra - Factor completely. (a^2+2ab+b^2-c^2)