Question

if (a+b)=2 and (a-b)=10.... Find: (i) (a²+b²) (ii) ab​

Answer 1

Step-by-step explanation:

(a+b)²+(a-b)²=(2)²+(10)²

a²+b²+2ab+a²+b²-2ab=4+100

2(a²+b²)=104

a²+b²=52

(a+b)²=(2)²

a²+b²+2ab=4

52+2ab=4

2ab=-48

ab=-24