Question

Решите уравнения:
1) х(х-4)+х-4=0
2) t(t+7)-4t-38=0

Answer 1

$1)x times (x - 4) + x - 4 = 0 \ (x + 1) + (x - 4) = 0 \ x1 = x + 1 = 0 \ x1 = - 1 \ x2 = x - 4 = 0 \ x2 = 4$
$2)t times (t + 7) - 4t - 28 = 0 \ t times (t + 7) - 4 times (t + 7) = 0 \ (t + 7) times (t - 4) = 0 \ t + 7 = 0 \ t = - 7 \ t2 = t - 4 = 0 \ t2 = 4$