2xSquared+8x-17=8x+15
solve for x
solve for x
-
First get everything with an x on the left side of the equation, and constants on the right. The 8x will cancel and this yields:
2x^2=32
Divide by 2:
x^2=16
Take the square root of x, here you can't forget that 4^2=16, BUT (-4)^2=16 as well, so your final answer is:
x= 4, -4
2x^2=32
Divide by 2:
x^2=16
Take the square root of x, here you can't forget that 4^2=16, BUT (-4)^2=16 as well, so your final answer is:
x= 4, -4
-
2x² + 8x - 17 = 8x + 15
2x² - 32 = 0
x² - 16 = 0
(x-4)(x+4) = 0
x = -4, 4
2x² - 32 = 0
x² - 16 = 0
(x-4)(x+4) = 0
x = -4, 4