Simplify the expression (1 - 3n3 + 2n4) + (8n4 – 13 – 7)

=

Step-by-step explanation:

Given that:

=(1 - 3n3 + 2n4) + (8n4 – 13 – 7)

By opening the brackets we get:

= 1-3n3 +2n4 +8n4 -13 -7

By adding like terms: Constants into constants and variables with same powers of x.....

= -20 - 3n3 +10n4

So by arranging the answer in decreasing order of powers of x:

=

I hope it will help you!

341

step-by-step explanation:

all you have to do is 9x31 (which equals 279) and then 20x31 (which equals 620). then you have to subtract. 620-279=341.

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