作业帮x(x+1)^2-x(x^2+x)-x+7化简
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x(x+1)^2-x(x^2+x)-x+7化简
x(x+1)^2-x(x^2+x)-x+7化简
x(x+1)^2-x(x^2+x)-x+7化简
x(x+1)^2-x(x^2+x)-x+7
=x(x²+2x+1)-x³-x²-x+7
=x³+2x²+x-x³-x²-x+7
=x²+7
X(X+1)^2-X^2(X+1)-X+7
=(X+1)(X^2+X-X^2)-X+7
=X^2+7
x ( x + 1) ² - x ( x² + x ) - x + 7
= x ( x + 1) ² - x ( x² + x + x ) - x + 7
= x ( x + 1) ² - x ( x² + 2x + 1 - 1) + 7
= x ( x + 1) ² - x ( x² + 2x + 1) - ( - x ) + 7
= x ( x + 1) ² - x ( x + 1) ² + x + 7
= x + 7
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