Question

simplify: (3m+5n)3 - (3m-5n)​

Answer 1

Answer:

6m+20n

Step-by-step explanation:

Let's simplify step-by-step.

(3m+5n)(3)−(3m−5n)

Distribute the Negative Sign:

=(3m+5n)(3)+−1(3m−5n)

=(3m+5n)(3)+−1(3m)+−1(−5n)

=(3m+5n)(3)+−3m+5n

Distribute:

=(3m)(3)+(5n)(3)+−3m+5n

=9m+15n+−3m+5n

Combine Like Terms:

=9m+15n+−3m+5n

=(9m+−3m)+(15n+5n)

=6m+20n

Answer 2

Answer:

27m³+125n³+135m²n+225mn²−3m+5n

Step-by-step explanation:

= (3m+5n)³-1(3m)-1(-5n)

= (3m+5n)³-3m+5n

= {(3m)³+(5n)³+3(3m)(5n)(3m+5n)}-3m+5n

= 27m³+125n³+135m²n+225mn²-3m+5n

HOPE IT HELPS.................