Question

Determine o valor de a²+b², sendo a-b = 15 e ab = -25

Answer 1

sendo a-b=15 e ab=-25 =>

${(a-b)}^{2} = {15}^{2}$

${a}^{2} -2ab + {b}^{2} =225$

${a}^{2} + {b}^{2} = 225-50 = 175$