Answer: =−7x3+14x2−7x
Step-by-step explanation: (x2+x2−5x2+x2−5x2+7x)(x−1)
=(x2+x2+−5x2+x2+−5x2+7x)(x+−1)
=(x2)(x)+(x2)(−1)+(x2)(x)+(x2)(−1)+(−5x2)(x)+(−5x2)(−1)+(x2)(x)+(x2)(−1)+(−5x2)(x)+(−5x2)(−1)+(7x)(x)+(7x)(−1)
=x3−x2+x3−x2−5x3+5x2+x3−x2−5x3+5x2+7x2−7x
=−7x3+14x2−7x
