1: Factor each completely:
x2 - 64
(x - 8)2
(x - 16)(x - 4)
(x + 8)(x - 8)
2: x2 + 4x + 4
(x + 2)2
(x + 4)(x + 1)
(x - 2)(x + 2)
3: 25x2 - 30x + 9
(5x - 3)2
5(x + 3)(x - 3)
(5x + 3)(5x - 3)
4: 4x2 - 144
4(x - 6)2
4(x - 6)( x + 6)
(4x - 12)(x + 12)
5: 36x2 - 12x + 1
(6x - 1)2
(6x - 1)(6x + 1)
(6x - 4)(6x + 3)
6: 6b2c3 - 18b2c2d2
6bc (c - 3d)
6b2c2d2(c - 3)
6b2c2(c - 3d2)
7: 4x4 + 40x3
(4x2 + x)(10x2 + x2)
4x3(x + 10)
(4x2 + x)2
8: x2 - 6x + 9
(x - 3)(x + 3)
(x - 3)2
(x - 2)(x - 4)
9: x2 - 121
(x - 11)(x + 11)
(x - 11)2
(x + 11)2
10: x2 + 8x + 16
(x + 16)(x + 1)
(x + 16) (x - 8)
(x + 4)2
11: x2 - 22x + 121
(x - 11)2
(x - 11)(x + 11)
(x + 11)2
12: 49x2 - 64
(7x - 8)(7x + 8)
7(x2 - 9)
7(x - 3)(x + 3)
13: 16x2 - 25
(4x + 5) (4x - 5)
(4x - 5)2
(4x + 5)2
14: 49x2 - 100
(7x +10)2
(7x - 10)2
(7x + 10) (7x - 10)
15: 9x2 + 48x + 64
(3x + 8)2
(3x - 8)2
(3x + 8)(3x - 8)
16: 6x2 - 60x + 150
6(x + 5)2
6(x - 5)2
(6x - 5)2
17: 7x2 - 63
7(x + 3)(x - 3)
7(x + 3)2
7(x - 3)2
18: Solve these by factoring:
2r2 - 162 = 0
r = 0, -9, 9
r = -9, 9
r = 2, -9, 9
19: 3x3 - 3x = 0
x = 1
x = -1, 1
x = -1, 0, 1
20: 81x2 + 200x + 100 - 20x = 0
x = -9, -10
x = -10/9
x = 0, 9, 10
2007-04-26
21:50:34
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9 answers
·
asked by
laney s
1
in
Mathematics