Question

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Answer 1

expand the left hand side and simplify. I am sure you can do it.

Answer 2

so it would be hold on

Answer 3

x^2+14^2=x^2+100?

Answer 4

2x^4

Answer 5

wait no i got 3.6 for the answr

Answer 6

your right hand side is wrong.
It should be x^2 + 20x + 100

Answer 7

oh yeah srory.

Answer 8

you got it though! :)

Answer 9

Thank you, it was 3.6?

Answer 10

I didn't solve it, I am not sure, check with wolfram alpha.