Answer:
quadratic formula
Step-by-step explanation:
correct me if I wring
x=-1 or x=-2
1.) 2x^2+6x+4=0
2x^2+2x+4x+4=0
2x(x+1)+4(x+1)=0
2(x+1)(x+2)=0
x+1=0 or x+2=0