Question

Factorizar a(a-5)=36

Answer 1

Explicación paso a paso:

$a {}^{2} - 5a = 36$

$a {}^{2} - 5a - 36 = 0$

$a {}^{2} + 4a - 9a - 36 = 0$

$a(a + 4) - 9(a + 4) = 0$

$(a + 4)(a - 9) = 0$

$a + 4 = 0 \\ a - 9 = 0$

$a = - 4 \\ a = 9$

$a1 = 4.a2 = 9$