lilgoonin lilgoonin

11-10-2018
Mathematics

contestada

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

Respuesta :

jimrgrant1 jimrgrant1

11-10-2018

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

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