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x(x+2)5(x+2)=x2+2x+5x+10
x(x-5)2(x-5)=x2-5x+2x-10
3p(p-5q)2q(p-5q)=3p2-5pq+2pq-10
3p(2p+7q)-4q(2p+7q)=6p2+21pq-8pq-28q2 semoga membantu:)