Question

Answer 1

c: \(A=y\left(x-4\right)-5\left(x-4\right)=\left(x-4\right)\left(y-5\right)\)

\(=\left(14-4\right)\left(\dfrac{11}{2}-5\right)=10\cdot\dfrac{1}{2}=5\)

d: \(A=\left(x+1\right)^2-y^2\)

\(=\left(x+1+y\right)\left(x+1-y\right)\)

\(=\left(94.5+1+4.5\right)\left(94.5+1-4.5\right)\)

\(=9100\)