Question

4x ao quadrado+7x+3+=2x ao quadrado+2x

Answer 1

4x²+7x+3=2x²+2x

4x²-2x²+7x-2x+3=0

2x²+5x+3=0

Δ=b²-4ac

Δ=5²-4.2.3

Δ=25-24

Δ=1

x=(-b±✓Δ)/2a

x=(-5±1)/4

x1=(-5+1)/4

x1=-4/4=-1

x2=(-5-1)/4

x2=-6/4=-3/2

S={-1, -3/2}