felpopinha2 10/06/2018 A) D = 4x + x + x - (x+ x²+ 4) = -x² + 5x - 4 = - (x - 1)(x - 4)x= 1 e 4B) D = 1 + x² + x - (x + x +x) = x² - 2x + 1 = (x - 1)²x= 1
felpopinha2
A) D = 4x + x + x - (x+ x²+ 4)
= -x² + 5x - 4
= - (x - 1)(x - 4)
x= 1 e 4
B) D = 1 + x² + x - (x + x +x)
= x² - 2x + 1
= (x - 1)²
x= 1