Question

How do you evaluate `(8x - 4x ^ { 2} + 8) + ( 5+ 5x ^ { 2} + 5x ) - ( 8+ 7x - 6x ^ { 2} )`?

Answer 1

As it is just addition collect the coefficients

Explanation:

`f(x) = (8x-4x^2+8)+(5+5x^2+5x)-(8+7x-6x^2)`
`= x^2(-4+5-(-6))+x(8+5-7)+(8+5-8)`
`=7x^2+6x+5`