Pre-Algebra Demystified

(c) 27x^5

(d) 9x^5

8. Find (
   2x^2 y^3 )^4.
   (a)
   16x^6 y^12
   (b)
   8x^6 y^7
   (c) 8x^6 y^3
   (d) 16x^8 y^12


9. Multiply y(2y^2
   yþ6).
   (a) 3y^3
   3y^2 þ 6
   (b) 2y^3
   y^2 þ6y
   (c) 3y^3
   4y^2 þ7y
   (d) 2y^3 þ3y^2 þ6y


10. Multiply
    5a(6a^2 þ3abþ2b).
    (a)
    11a^3
    2a^2 b
    3ab
    (b) 11a^3 þ8a^2 bþ7ab
    (c)
    30a^3
    15a^2 b
    10ab
    (d) 30a^3 þ15a^2 bþ10ab


11. Multiply (x
    9)(2x
    1).
    (a) 2x^2
    19xþ 9
    (b) 2x^2 þ 9
    (c) 3x^2
    10
    (d) 2x^2 þ19xþ 9


12. Multiply (4x
    7)(2xþ1).
    (a) 8x^2
    14x
    7
    (b) 6x^2
    7
    (c) 8x^2
    7
    (d) 8x^2
    10x
    7


13. Find (xþ7)^2.
    (a) x^2 þ 49
    (b) x^2 þ14xþ 49
    (c) x^2 þ7xþ 49
    (d) 2x^2 þ 14


14. Find (3x
    8)^2.

CHAPTER 12 Monomials and Polynomials 249