(3x+1)2- (3x-1)2=11+1.2 (5+2y)(y-3)-2(y-1)2=0 9x2-1=(3x-2)2

Question

(3x+1)2- (3x-1)2=11+1.2

(5+2y)(y-3)-2(y-1)2=0

9x2-1=(3x-2)2

Answer 1

6x+2-6х+2=12.2

6х+6х=12.2-2-2

12х=8.2

х=8.2:12

х=0.