(2m-3m) (5m+n)-10(m+n)2

Question

(2m-3m) (5m+n)-10(m+n)2

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Answer 1

(2m-3n)(5m+n)-10(m+n)² = 10m²+2mn-15mn-3n² -10(m²+2mn+n²) =  10m²+2mn-15mn-3n²-10m²-20mn-10n² = -33mn-13n² = -n(33m-13n)

Comments

поможете пожалуйста с б примером?

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(-3a^2b^3)^3*(-2a^5b)^2=-27a^6b^9*4a^10b^2=-108a66+10^b9+2=-108a^16b^11