Pre-Algebra Demystified

(a) 9x^2 
24xþ 64

(b) 9x^2 
 64

(c) 9x^2 
48xþ 64

(d) 9x^2 þ 64

15. Multiply (3a^2 þ2a
    1)(5a
    1).
    (a) 15a^3 þ13a^2 þ7a
    1
    (b) 15a^3 þ7a^2
    10aþ 1
    (c) 15a^3
    13a^2
    10a
    1
    (d) 15a^3 þ7a^2
    7aþ 1


16. Multiply (x
    3)(x^2 þ4x
    6).
    (a) x^3 þx^2
    18xþ 18
    (b) x^3
    x^2 þ18x
    18
    (c) x^3 þx^2
    18x
    18
    (d) x^3 þx^2 þ18xþ 18


17. Divide 15x^3 3x.
    (a) 5
    (b) 5x^2
    (c) 5x
    (d) 5x^3


18. Divide
    32a^2 b^3 c^4 8ab^3 c^2.
    (a)
    4ac^2
    (b) 4ab^2 c
    (c)
    4abc
    (d) 4a^2 bc


19. Divide 32x^2 þ30x
    6by2.
    (a) 16x^2
    15x
    3
    (b) 16x^2 þ15x
    3
    (c) 16x^2 þ30x
    6
    (d) 16x^2
    15xþ 6


20. Divide 25a^2 b^3
    20 a^4 b^2 þ15ab by
    5ab
    (a) 5ab
    4a^2 b
    3
    (b)
    5a^2 bþ4ab
    3
    (c) 5ab^2 þ4a^3 b
    3
    (d)
    5ab^2 þ4a^3 b
    3

250 CHAPTER 12 Monomials and Polynomials