решите:a x b+c x(a-b)
axb + cx(a-b)
axb+cxa-cxb
x(ab+ac-cb)
a x b+c x(a-b)=axb+cxa-cxb=x(ab+ca-cb)
ВОТ ТАК ПРАВИЛЬНО!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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axb + cx(a-b)
axb+cxa-cxb
x(ab+ac-cb)
a x b+c x(a-b)=axb+cxa-cxb=x(ab+ca-cb)
ВОТ ТАК ПРАВИЛЬНО!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!