Posted by **mema** on Sunday, May 22, 2011 at 12:47am.

add the following

(-8x^2-2x+4)+(x^2-9x+7)

- algebra -
**Anonymous**, Sunday, May 22, 2011 at 2:00am
(-8x^2-2x+4)+(x^2-9x+7)=

-8x^2+x^2 -2.4x+(-9x) +4+7=

-7x^2 -2.4x-9x +11=

-7x^2 -11.4x +11

- algebra -
**Jai**, Sunday, May 22, 2011 at 2:02am
(-8x^2-2x+4)+(x^2-9x+7)

to add, we just combine the numerical coefficients (or the numbers before the variable) of the same variables (meaning same letters and same exponents).

thus,

(-8x^2 - 2x + 4 ) + ( x^2 - 9x + 7 )

-7x^2 - 11x + 11

hope this helps~ :)

## Answer This Question

## Related Questions

- Math - Which of the following would eliminate the variable on the left side of ...
- math - Which of the following would eliminate the variable on the left side of ...
- math - Which of the following would eliminate the variable on the left side of ...
- Math - Which of the following would eliminate the variable on the left side of ...
- algebra - add the following (8.1x^2-5.9x-7.1)+-9.8x^2-8.1x-4.8)
- statistics - Use summation notation to express each of the following ...
- statistics - Use summation notation to express each of the following ...
- algebra - add tyhe following (-8x^2-2x+4)+(x^2-9x+7)
- Chemistry - Sorry, I didn't finish the question: Which of the following will ...
- algebra - Short Answer. Add the following polynomials. (4x^2-3x+2)+(5x^3-7x^2-9)

More Related Questions