Question

Solve the system of equations.

y = 2x
y = x2-8
O A. (2, 4) and (-4,-8)
O B. (-2,-4) and (-4,-8)
O C. (2, 4) and (4,8)
O D. (-2,-4) and (4,8)​

Answer 1

D

Step-by-step explanation: Time Stamp (6 9 10 32)

Easiest way is to graph both equation and look for the intersections see attached sreen shot

or solve by substitution

y = 2x

y = x²- 8

2x = x²- 8 solve for x

0 = x² - 2x - 8 factor

0 = (x - 4)(x + 2)

0 = 0 when x = 4 and -2

calculate the y values

y = 2x x = 4

y = 8 (4, 8)

y = 2x x = -2

y = -4 (-2, -4)