Question

(5a+b)²-(4a-b)²
con procedimiento por favor

Answer 1

Explicación paso a paso:

$( {5a}^{2} + b)^{2} - ( - 4a - b {}^{2} ) \\ = 25 {a}^{2} + 10ab + {b}^{2} - ( -4a - {b)}^{2} \\ = 25 {a}^{2} + 10ab + {b}^{2} - ( 16 {a}^{2} - 8ab + {b}^{2} ) \\ = 25 {a}^{2} + 10ab + {b}^{2} - 16 {a}^{2} + 8ab - {b}^{2} ) \\ simplificar \\ = 9 {a}^{2} + 18ab$

Espero te sirva :)