Question

C=(x^2-3x)(x^2-11x+28)

Answer 1

\(\left(x^2-3x\right)\left(x^2-11x+28\right)=x^4-11x^3+28x^2-3x^3+33x^2-84x=x^4-14x^3+61x^2-84x\)

Answer 2

\(C=\left(x^2-3x\right)\left(x^2-11x+28\right)\)

\(=x^4-11x^3+28x^2-3x^3+33x^2-84x\)

\(=x^4-14x^3+51x^2-84x\)