Question

If ab=5 and a*a+b*b=25,then (a+b)(a+b)=?​

Answer 1

(a + b) (a + b) = 35

Explanation:

`{(a + b)}^(2) = {a}^(2) + {b}^(2) + 2ab \\ \\ (a + b) (a + b) = a \ast a + b \ast b + 2ab \\ \\ = 25 + 2 * 5 \\ \\ 25 + 10 \\ \\ (a + b) (a + b) = 35`