Question

Resolva a equação: x² - 2abx - 3a²b², sendo x a variável.

S = {– ab, ab}

S = {– ab, 3ab}

S = {ab, – 3ab}

S = {– 2b, 3a}

n.d.r​

Answer 1

Resposta:

∆=b²-4a.c

∆=(-2ab)²-4.1.(-3a²b²)

∆=4a²b²+12a²b²

∆=16a²b²

x= (- (-2ab)+- √∆)) /2.1

x= (2ab+-√16a²b²)/2

x= (2ab +-4ab)/2

X1=(2ab+4ab)/2= 6ab/2= 3ab

X2= (2ab-4ab)/2= -2ab/2= -2ab

S={ -ab, 3ab}