# factoring

posted by .

a^2-2ab-15b^2

a^2-2ab-15b^2 =

(a - b)^2 - 16 b^2 =

[a - b + 4 b]* [a - b - 4b] =

(a + 3b)*(a - 5b)

## Similar Questions

1. ### Please Check My Math Work

a^2 - 2ab - 15b^2 This is what I got: (a-5b)(a+3b) Correct! x^4+2x^3-4x^2-5x-6 DIVIDED BY x^2+x-2 My answer: x^2+x-3 remainder of -12\x^2+x-2
2. ### factoring completly

3x^2 + 17x + 10 5y^8 - 125 a^2 - 2ab - 15b^2 4c^2 - 12c + 9 p4 - 1 6y^2 - 54 x^2 + 10x + 21 a^2 - 10ab + 3b^2 5x^2 - 10x x^2 + 12xy + 35y^2 Can someone help me with these I will be happy to critique your work. http://library.thinkquest.org/29292/quadratic/2factoring/practice.htm …
3. ### factoring completly

can anyone help me with these: 3x2 + 17x + 10 5y8 - 125 a2 - 2ab - 15b2 4c2 - 12c + 9 5 y^8 - 125 = 5(y^8 - 25) y^8 - 25 can be written (y^4 - 5)(y^4 + 5) For the others, you need to try a few factors until you find a pair that works. …
4. ### algebra

Is this correct? subtract (4a^3+2b^3)-(6a^3+5a^2b-2ab^2+2b^3) answer: -2a^3-5a^2b+2ab^2
5. ### Geometry

Which statement is true for the expression 6a + 15b − 4a − 8c?
6. ### Algebra

combine like terms (simplify) 11/14a-1/15b+1/14a-11/15b
7. ### algebra

combine like terms 11/14a-1/15b+1/14a-11/15b
8. ### college math

combine like terms (simplify) 11/14a - 1/15b + 1/14a - 11/15b would the correct answer be 12/14a + 10/15b
9. ### college math

original question 11/14a - 1/15b + 1/14a - 11/15b is this answer correct 12/14a + 12/15b
10. ### Polynomials

State whether the following equations are sometimes, always or never true. a) a^2-2ab-b^2= (a-b)^2, bis not equal to 0 b) a^2+ b^2= (a+b)(a+b) c) a^2-b^2= a^2-2ab+b^2 d) (a=b)^2 = a^2+2ab+b^2 I don't understand what these questions …

More Similar Questions

Post a New Question