Simplify the following expression.

-7x² - 5x-6x² + 4 + 15x

-13x²+10x+4

Step-by-step explanation:

You need to group all of the same variables together:

-7x² - 5x - 6x² + 4 + 15x

-7x²-6x²-5x+15x+4

-13x²+10x+4

Answer: - 13x^2 + 10x + 4

Step-by-step explanation:

group all of the same variables together to simplify the equation.

-7 - 6 = - 13 / / the x^2 value

-5 + 15 = 10 / / the x value

4 is the only number without an exponent so leave it alone.