Question

If x(a) = a2 + 2a + 1 and

w(a) = 9a2 + 20a - 1,
then what is x(a) + w(a)?

Please help!! Been stuck on this question for a day !

Answer 1

10a^2 + 22a

Explanation:

x(a)+w(a) means to just add the expressions (a^2+2a+1) and (9a^2+20a-1) since that is what x(a) and w(a) equal and because of the + between them.

(a^2 + 2a + 1)

+ (9a^2 +20a - 1)

_______________

10a^2 +22a +0

Or just 10a^2 + 22a.

Answer 2

`\large\boxed{10a^2+22a}`

Explanation:

In this question, we're solving for x(a) + w(a).

What this means is that we would be adding both expressions together.

Your expression should look like this:

`a^2 + 2a + 1 + 9a^2 + 20a - 1`

Solve:

`a^2 + 2a + 1 + 9a^2 + 20a - 1\\\\\text{Combine like terms}\\\\10a^2+2a+1+20a-1\\\\10a^2+22a+1-1\\\\\boxed{10a^2+22a}`

When you're done solving, you should get 10a²+22a.

This means that 10a²+22a would be the correct answer.

I hope this helped you out.

Good luck on your academics.

Have a fantastic day!