4(3x2+2x-7)
12x2+8x-28
x2 + 3x - 10
(x + 5)(x - 2)
x2 = 25
2x + 4 y = -26
-2x - 2y = 6
(7, -10)
What is f(-4)
f(-4) = -11
8x2(3x2-2x+5)
24x4 - 16x3 + 4x2
x2 - 9x +20
(x-4)(x-5)
x = + sqrt(32) and - sqrt(32)
Bonus
x = +4sqrt(2) and -4sqrt(2)
4x + y = -1
-x + y = -11
(2, -9)
What is g(-2)?
g(-2) = 7
(x + 5)(x + 3)
(x2 +8x + 15)
x2 + 12x + 11
x = +/- 4
-x + 5y = 24
(-4, 4)
w(x) = x3 - 5
What is w(-4)?
w(-4) = -69
(x - 9)(x + 3)
x2 - 6x - 27
x2 + 5x - 6
(x - 3)2 = 81
x = 3 +/- 9
x = 12 or -6
2x + 2y = 28
12x + 4y = 136
(10, 4)
d(x) = 2x
What is d(4)?
d(4) = 16
(4x2 +2x)(x2 - 3x + 9)
4x4 - 12x3 + 36x2 +2x3 - 6x2 + 18x
4x4 - 10x3 -30x2 + 18x
x3 + 7x2 + 12x
x(x+3)(x+4)
(x + 5)2 = 20
x = -5 +/- 2(sqrt5)
y = -2x - 11
x + y = -1
(-10, 9)
h(x) = 4x
What is h(-2)?
h(-2) = 1/16 = 0.0625