Question

$49 {b}^{2} + 84bd + 36 {d}^{2}$

Answer 1

(7b+6d)^2=49b^2+84bd+36d^2

Answer 2

Heya !!!


$49 {b}^{2} + 84bd + 36 {d}^{2} \\ \\ 49 {b}^{2} = {(7b)}^{2} \\ 36 {d}^{2} = {(6d)}^{2} \\ \\ \\ =( 7 {b})^{2} + 2 \times 7b \times 6d + {(6d)}^{2} \\ \\ = {(7b + 6d)}^{2}$



Hope it helps.