Solve each equation by factoring.
p2 -2p - 15
(-5,0) , (3,0)
-2x2 + 72
2x2 - 4x - 7
x = +/- 6√2
f(x) = a2 + 14a - 51
(3,0) , (-17,0)
√64
8
n2 - 13n - 30
(2,0) , (-15,0)
3x2-24
x = +/- 2√2
f(x) = b2 − 4b + 4
x = 2
x2 − 12x + 11 = 0
(11,0) , (1,0)
√196
14
7r2 + 84 + 49r
(-4,0) , (-3,0)
(4x + 1)2 - 16 = 0
x = 3/4 or x = -5/4
f(x) = x2 − 5x − 14
x = 7 , -2
n2 = 18n + 40
{20, −2}
√63
3√7
-3v2 - 12v + 135
(-9,0) , (5,0)
34 = (a - 2)2 - 2
a = 8 or a = -4
2x2 − 3x − 5 = 0
(5/2 , -1)
x2 − 10x + 26 = 8
5 +/- √7
√89
√89
x2 - 9801
(-99,0) , (99,0)
y = 3(x + 7)2 - 24
x = -7 + 2√2
or
x = -7 - 2√ 2
9n2 = 4 + 7n
7 +/- √193 ÷ 18
√9
3