Question

3 x elevado a 2 + 5 x = - x - 9 + 2 x elevado a 2
??? Me ajudem

Answer 1

3x^2+5x=-x-9+2x^2

3x²+5x+x-2x²=-9

1x²+6x=-9

x²+6x+9=0

Δ=6²-4.1.9

Δ=36-36

Δ=0

x1=-6+0/2

x2=6-0/2

x1 e x2 = -3