Question

If ab = 8 and a +b =6 then what is the value of (a×a +b×b)

Answer 1

Answer:

a^2+b^2=20

Step-by-step explanation:

ab= 8

a+b=6

(a+b)^2=a^2+2ab+b^2

6^2 = a^2+b^2+2*8

36= a^2+b^2+16

36-16=a^2+b^2

20=a^2+b^2