Question

what is the answer of (a) and (b)?​

Answer 1

Answer:

a) (a-b) ^2=5^2

= a^2+b^2-2ab=25

a^2+b^2-72=25

= a^2 +b^2 =25+72

= a^2+ b^ 2 = 97

a^2+ab+b^2=131

B) (a-b) (a^2+ab+b^2)

= 5 × 131 = 655