X squared +x (×-5)-×+7

2 answers:

8 0

$x^{2} +x(x-5)-x+7 \\ = x^{2} + x^{2} -5x-x+7 \\ =2 x^{2} -6x+7$

7 0

X^2 + x2 - 5x - x +7 = 2x^2 - 6x +7

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