Question

Subtract second expression from first
3m2 - 5mn - 7n2 ; 2mn-5n2-m2​

Answer 1

Answer:

your answer will be 4m2 - 7mn - 2n2

Answer 2

Answer:

2mn-5n^2-m^2-(3m^2-5mn-7n^2)

2mn-5n^2-m^2-3m^2+5mn+7n^2

2mn+5mn-5n^2+7n^2-m^2-3m^2

7mn+2n^2-4m^2

here ^2 means raise to power 2

Step-by-step explanation:

2mn-5n^2-m^2-(3m^2-5mn-7n^2)

2mn-5n^2-m^2-3m^2+5mn+7n^2

2mn+5mn-5n^2+7n^2-m^2-3m^2

7mn+2n^2-4m^2

here ^2 means raise to power 2