Question

como resolver ecuacion lineal 2a²- {a + [2(a-1) (a+3)] } = 26

Answer 1

Explicación paso a paso:

$2a {}^{2} - (a + (2a - 2)(a + 3))) = 26 \\ 2a {}^{2} - (a + (2a {}^{2} + 6a - 2a - 6) = 26 \\ 2a {}^{2} - (a + 2a { }^{2} + 4a - 6) = 26 \\ 2a {}^{2} - 5a + 2a {}^{2} - 6 = 26 \\ - 5a + 6 = 26 \\ - 5a = 26 - 6 \\ - 5a = 20 \\ a = \frac{20}{ - 5} \\ a = - 4$