Объяснение:
3m(c-d)-4n(d-c)=(3m+4n)(c-d)
3m(c-d) -4n(d-c)=
=3m(c-d)+4n(-d+c)=
=3m(c-d)+4n(c-d)=
=(c-d)(3m+4n)
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Объяснение:
3m(c-d)-4n(d-c)=(3m+4n)(c-d)
Verified answer
3m(c-d) -4n(d-c)=
=3m(c-d)+4n(-d+c)=
=3m(c-d)+4n(c-d)=
=(c-d)(3m+4n)