Question

a-b=3 and ab=2, find the value of a square + b square

Answer 1

Step-by-step explanation:

in this type of math we have to know

the type of identity used.

according to your question the identity used

is (a+b)^2=(a-b)^2+2ab so that, a-b=3

ab=2

=(3)^2+2×2

=9+4

=13(ANS.)