Question 4: Reducing the expression \(\begin{aligned} -9(x+1)(x-3)-5 \end{aligned}\) we get
\(\begin{aligned} -9(x+1)(x-3)-5 &=(-9 x-9)(x-3)-5=-9 x^{2}+27 x-9 x+27-5 \\ &=-9 x^{2}+18 x+22 \end{aligned}\)
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Question 4: Reducing the expression \(\begin{aligned} -9(x+1)(x-3)-5 \end{aligned}\) we get
\(\begin{aligned} -9(x+1)(x-3)-5 &=(-9 x-9)(x-3)-5=-9 x^{2}+27 x-9 x+27-5 \\ &=-9 x^{2}+18 x+22 \end{aligned}\)
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