Question

${x}^{3} + 2 {x}^{2} - x - 2$
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Answer 1

Heya❤

$x {}^{3} + 2x {}^{2} - x - 2 = 0 \\ x {}^{3} + 2x {}^{2} - x = 2 \\ x(x {}^{2} + 2x - 1) = 2 \\ x(x {}^{2} + 2x - 1) - 2 = 0 \\ {x}^{2} + 2x - 1 - 2 = 0 \\ x {}^{2} + 2x - 3 = 0 \\ x {}^{2} - x + 3x - 3 = 0 \\ x(x - 1) + 3(x - 1) = 0 \\ (x - 1)(x + 3) = 0 \\ \\ now.. \\ \\ (x - 1) = 0 \\ x = 1 \\ (x + 3) = 0 \\ x = - 3$

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