Question

Solve each equation by graphing. Round to the nearest tenth.

-2x²+2= -3x


A) −1, −2


B) 2, −0.5


C) −1, 2


D) 0.5, −3

Answer 1

B

rearrange into standard form : ax² + bx + c = 0 (a≠ 0)

2x² - 3x - 2 = 0

(x - 2)(2x + 1) = 0 ( equate each factor to zero and solve for x )

x - 2 = 0 ⇒ x = 2

2x + 1 = 0 ⇒ x = - 0.5