1.

Solve: (x+4)(x-3)= (x) (x+3)-22

Answer»

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x {}^{2} - 3x + 4x - 12



x {}^{2} + x - 12



x {}^{2} + x - 12 = x {}^{2} + 3x - 22





x - 12 = 3x - 22




x - 3x = - 22 + 12 \\ \\ - 2x = - 10




x = \frac{10}{2} = 5


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