Question

Simplify (7x2− 2x + 9) + (3x2+ 15x − 4)

Answer 1

Answer:

10x^2+13x+5

Step-by-step explanation:

(7x^2− 2x + 9) + (3x^2+ 15x − 4)

Combine like terms

(7x^2+3x^2− 2x+  15x + 9 − 4)

10x^2+13x+5

Answer 2

Answer:

$10x^{2} + 13x + 5$

Step-by-step explanation:

In this equation, you need to add all the like terms. For example, 7x² and 3x² are like terms, since they both are being squared.

First find the like terms:

7x² + 3x²

-2x + 15x

9 - 4

Now simplify the above equations.

7x² and 3x² is equal to 10x². You only have to add the whole number, the exponent stays the same.

-2x + 15x is equal to 13x. Since -2 is negative, you can simply take away two from 15, which is 13, making it 13x.

9 - 4 is equal to 5.

Now add everything together.

$10x^{2} + 13x + 5$

Your answer is 10x² + 13x + 5.