Question

Subtract: –m² + 5mn from 4m² – 3mn +9​

Answer 1

Answer:

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Step-by-step explanation:

4m2−3mn+8−(−m2+5mn)=4m2−3mn+8+m2−5mn

=4m2+m2−3mn−5mn+8

=5m2−8mn+8.

Answer 2

Answer:

$5{m}^{2} - 8mn + 9$

Step-by-step explanation:

$4 {m}^{2} - 3mn + 9 - ( - {m}^{2} + 5mn) \\ 4 {m}^{2} - 3mn + 9 + {m}^{2} - 5mn \\ 5{m}^{2} - 8mn + 9$