Question

São do segundo grau incompleta x(x+3)+4x+2=5x+2

Answer 1

Explicação passo-a-passo:

$\sf x\cdot(x+3)+4x+2=5x+2$

$\sf x^2+3x+4x+2=5x+2$

$\sf x^2+7x+2=5x+2$

$\sf x^2+7x-5x+2-2=0$

$\sf x^2+2x=0$

$\sf x\cdot(x+2)=0$

• $\sf \red{x'=0}$

• $\sf x+2=0$

$\sf \red{x"=-2}$

$\sf S=\{-2,0~\}$

Answer 2

Oie, Td Bom?

$x \: . \: (x + 3) + 4x + 2 = 5x + 2$

$x {}^{2} + 3x + 4x = 5x$

$x {}^{2} + 7x = 5x$

$x {}^{2} + 7x - 5x = 0$

$x {}^{2} + 2x = 0$

$x \: . \: (x + 2) = 0$

• $x = 0$

• $x + 2 = 0⇒x = - 2$

$S = \left \{ - 2 \: ,\: 0\right \}$

Att. Makaveli1996