Question

a) (5×+3) . (5×-3)

b) (3a-5) . (3a+5)​

Answer 1

Explicação passo-a-passo:

A)

$(3a - 5) \times (3a + 5)$

$(3a) {}^{2} - 5 {}^{2}$

$9a {}^{2} - 25$

B)

$(5x + 3) \times (5x - 3)$

$(5x) {}^{2} - 3 {}^{2}$

$25x {}^{2} - 9$