Question 25: Reducing the expression \((2 x-3)^{2}-x(x+1)\) we get
\((2 x-3)^{2}-x(x+1)=(2 x)^{2}-2 \cdot 2 x \cdot 3+9-x^{2}-x=4 x ^{2}-12 x+9-x^{2}-x=3 x^{2}-13 x+9 \)
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Question 25: Reducing the expression \((2 x-3)^{2}-x(x+1)\) we get
\((2 x-3)^{2}-x(x+1)=(2 x)^{2}-2 \cdot 2 x \cdot 3+9-x^{2}-x=4 x ^{2}-12 x+9-x^{2}-x=3 x^{2}-13 x+9 \)
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