Объяснение:
mp^2-mq^2=m*(p-q) *(p+q)
20a^2-5=5(2a-1) *(2a+1)
c-c^3=c(1-c)*(1+c)
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Объяснение:
mp^2-mq^2=m*(p-q) *(p+q)
20a^2-5=5(2a-1) *(2a+1)
c-c^3=c(1-c)*(1+c)