Question

calcule as questoes quadrasticas incompletas da decomposiçao a) -x ao quadrado +4x=0 b) x ao quadrado +3x=0

Answer 1

a
-x² + 4x = 0
x² - 4x = 0
x( x - 4 ) = 0
x = 0 ****
x - 4 = 0
x = 4 *****

b
x² + 3x = 0
x( x + 3) = 0
x = 0 ****
x + 3 = 0
x = -3 ****