Question

alguien me ayuda porfavorrr​

Answer 1

Explicación paso a paso:

$area = (5a - 7)(5a + 7) \\ area = 25 {a}^{2} - 49$

Si a=2

$area = 25 \times {2}^{2} - 49 = 100 - 49 \\ area = 51 {m}^{2}$