add the following
(8.1x^2-5.9x-7.1)+-9.8x^2-8.1x-4.8)
I need helppp. With 7.1-2.34+5.9
(8.1x^2-5.9x-7.1)+(-9.8x^2-8.1x-4.8)=
8.1x^2+(-9.8x^2) -5.9x+(-8.1x) -7.1+(-4.8)=
8.1x^2-9.8x^2 -5.9x-8.1x -7.1-4.8=
-1.71x^2 -14x -11.9
To add the given expressions, you need to combine like terms. Here's how you can do it step-by-step:
1. Start by grouping the terms with the same powers of x:
(8.1x^2 - 9.8x^2) + (-5.9x - 8.1x) + (-7.1 - 4.8)
Notice that the terms with x^2 are combined and the same goes for the terms with x.
2. Simplify each group separately:
(8.1 - 9.8)x^2 + (-5.9 - 8.1)x + (-7.1 - 4.8)
Subtract the coefficients in each group.
3. Perform the calculations:
-1.7x^2 - 14x - 11.9
Therefore, the sum of the given expressions is -1.7x^2 - 14x - 11.9.