Question

3xao quadrado+3x-6=0

Answer 1

Resposta:

S={-2;1}

Explicação passo-a-passo:

3x² +3x-6=0

a=3

b=3

c=-6

Δ=b²-4ac

Δ=3²-4(3)(-6)

Δ=9+72

Δ=81

$x={-b\pm\sqrt{\Delta}\over2a}={-3\pm\sqrt{81}  \over2(3)}={-3\pm9\over6}\\ \\ x'={-3+9\over6}={6\over6}=1\\ \\ x"={-3-9\over6}=-{12\over6}=-2$