7) y= x^2-4x
8) y= 2x^2-3x+1
9) y= 9x^2-4
Answer:
1/2.(x+12)=4x-1
x+12=2(4x-1)
x+12=8x-2
Group like terms
12+2=8x-x
14=7x
Divide both sides by 7
x=2
Step-by-step explanation:
X is 79 because all angles are 180
Answer:
2x² - 3x - 8
Step-by-step explanation:
note that (f - g )(x) = f(x) - g(x)
= 2x² - 5 - (3x + 3) = 2x² - 5 - 3x - 3 = 2x² - 3x - 8
