Question

3t(t+1)=2t+2怎么解?

Answer 1

3t(t+1)=2t+2

3t(t+1)-2(t+1)=0

(3t-2)(t+1)=0

解得t1=2/3 t2=-1

2（x+5）^2-4（x+5）=0

(x+5)[2(x+5)-4]=0

(x+5)(2x+6)=0

解得x1=-5 x2=-3