Question

find of the value of a2+b2 when a-b=13 and ab=31

Answer 1

Answer:

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

(13)^2 = a^2+b^2 - 2 *31

169 + 62 = a^2 + b^2

a^2 + b^2 = 23 1

Answer 2

Answer:

9/4x^2+12xy+16/49y^2