Question

Efetue os cálculos.
3x²-3x-18=0
5x²-35x+30=0
6x²-72x=0
2x²+8x+6=0

Answer 1

3x²-3x-18=0
3*(x-3)*(x+2)=0
x'=3
x''=-2

5x²-35x+30=0
5*(x-6)*(x-1)=0
x'=6
x''=1

6x²-72x=0
6*(x-12)*x=0
x'=0
x''=12

2x²+8x+6=0
2*(x+1)*(x+3)=0
x'=-1
x''=-3