Question

resolva:
(x-1) . (x+4) = 7x-4

Answer 1

x²+4x-x-4 = 7x - 4
x² +3x = 7x -4 +4
x²+3x - 7x = 0
x² - 4x = 0
x² = 4.x
x²/x = 4

Answer 2

( x - 1) (x + 4 )  = 7x - 4
x² + 4x  - 1x - 4  - x + 4 = 0
x² + 2x = 0
x ( x + 2 ) = 0
x = 0 *****
x + 2 = 0
x = -2 ****