The sides of the big and small squares are a and B respectively. The difference of their perimeter is 96 cm, and the difference of their area is 960 square cm. Find: 1, the value of a + B, 2, the value of ab

The sides of the big and small squares are a and B respectively. The difference of their perimeter is 96 cm, and the difference of their area is 960 square cm. Find: 1, the value of a + B, 2, the value of ab

4A-4B=96
A^2-B^2=960
A=28
B=12
A+B=40
AB=336