Помогите !!!!!!!!!!!

Question

Помогите !!!!!!!!!!!

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Answer 1

X(a-b)+y(b-a)=x(a-b)-y(a-b)=(x-y)(a-b)

Comments

m2(a-2)+n(2-a)=m2(a-2)-n(a-2)=(m2-n)(a-2)