Question

ayudenme por faaaaaaaaaaaaa

Answer 1

$a1 = (x - 3)(x + 3) = x {}^{2} - 9$

$a2 = (x + 5)(x + 5) = x {}^{2} + 10x + 25$

$a3 = (x - 3)(x - 7) = x {}^{2} - 10x + 21$

$a1 + a2 + a3$

$x {}^{2} + 9+ x {}^{2} + 10x + 25+ x {}^{2} - 10x + 21$

$3x {}^{2} + 37$

Respuesta

E)