If x(a) = a2 + 2a + 1 and
w(a) = 9a2 + 20a - 1,
then what is x(a) + w(a)?
been stuck on this question for a day !

Step-by-step 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:

Solve:

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

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

10a^2 + 22a

Step-by-step 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.

the sum of the lengths of any two sides of a triangle is greater than the length of the third side. if you take the three sides of a triangle and add them in pairs, the sum is greater than (not equal to) the third side. if that is not true, then it is not possible to construct a triangle with the given side lengths.

step-by-step explanation: