Question

-3-(a+1)-2(-a+1)=-a-(a+2)+2

Answer 1

-3-(a+1)-2(-a+1)=-a-(a+2)+2

3a-3+2a-2=a²-2a+2

3a+2a+2a=a²+2+2+3

7a=a²+7

a²-7a+7=0

∆=b²-4ac

∆=49-4.1.7

∆=49-28

∆=21

(-b+/-√∆)/2a

(7+/-4,6)/2.1

(-)A1=1,2

(+)A2=5,8