Question

Solve quadratic equation by factorization: x(2x + 1) = 10​

Answer 1

Step-by-step explanation:

$x(2x + 1) = 1 \\ 2x {}^{2} + x = 1 \\ 2x {}^{2} + x - 1 = 0 \\ 2x {}^{2} + 2x - x - 1 = 0 \\ 2x(x + 1) - 1(x + 1) = 0 \\ (x + 1)(2x - 1)$