m2-2n2 + 7mn- 5m2 -11mn -3n2 + 2n2
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Step-by-step explanation:
(2m
2
−3n
2
)(3m
2
+2n
2
)
=(2m
2
)(3m
2
)−(3n
2
)(3m
2
)+(2m
2
)(2n
2
)−(3n
2
)(2n
2
)
=6m
4
−9(mn)
2
+4(mn)
2
−6n
4
=6m
4
−5(mn)
2
−6n
4
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