Math

posted by .

Expand and simplify

1.(9a-3)^2

2.(x^2+2x-1)^2

3. 2(3a+4)(a-6)-(3-a)^2+4(5-a)

  • Math -

    [3(3a-1)]^2 = 9(9a^2 - 6a + 1) = 81a^2 - 54a + 9

    don't know which you'd consider simpler

    same with this one. expand it and get a 4th degree polynomial.

    2(3a+4)(a-6) - (3-a)^2 + 4(5-a)
    = 2(3a^2 - 14a -24) - (9 - 6a + a^2) + 20 - 4a
    = 6a^2 - 28a - 48 - 9 + 6a - a^2 + 20 - 4a
    = 5a^2 - 26a - 37

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. math

    how do i expand and simplify (2x+5) (3x-4)
  2. math

    expand and simplify (2x+5)(3x-4)
  3. math

    expand and simplify 4(3k-2)+3(4-k)
  4. math

    expand and simplify 1.(x^2-3x+4)(-x^2+3x-4) 2.3(2x-5)-9(4x-5)
  5. Math

    expand and simplify 1. -(y^2-4y+7)(3y^2-5y-3) 2.2(a+b^3
  6. Math

    Expand and simplify For + 5(a+8)= And for - 7(3d-6)
  7. Math

    How do you expand and simplify (x-2)(x+2)?
  8. Math

    Expand and simplify (p+3)(p-7)
  9. Urgent math

    so I tried to expand this question and I got x^3 *x2, i don't know if it's right but if not can I get a step by step explanation please, Expand (2x + y^2)^5. (Simplify your answer completely.)
  10. Algebra

    need help checking Create a 2-column proof for the following equation. X + X + 10 + 2(2X + 10) = 180 X + X + 10 + 2(2X + 10) = 180 (Given) 2X + 10 + 2(2X + 10) = 180 (Simplify) 2X + 10 + 4X + 20 = 180 (Expand) 6X + 30 = 180 (Simplify) …

More Similar Questions