Question

simplificar (a+5)(a-5)-3(a+2)(a-2)+5(a+4)​

Answer 1

Respuesta:

$- {2a}^{2} + 5a + 7$

Answer 2

$(a+5)(a-5)-3(a+2)(a-2)+5(a+4)$

R//

$2a {}^{2} + 5a + 7$

a² - 25 - 3 (a² + 2 ) x ( a - 2 ) + 5 (a + 4 )

a² - 25 - 3 ( a² - 4 ) + 5 ( a + 4)

a² - 25 - 3 ( a² - 4 ) + 5a + 20

a² - 25 - 3a² + 12 + 5a + 20

- 2a² + 7 + 5a

- 2a² + 5a + 7

Explicación paso a paso:

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