How do you add #(3x ^ { 2} - 5x - 5) + ( 9x ^ { 2} + 2x + 1)#?

1 Answer
Jun 18, 2018

Simplifying this expressions give us #12x^2-3x-4#

Explanation:

SO we can start adding like terms because if the plus sign between these trinomial (three terms in an expressions) algebraic expressions were to be replaced by a negative, we would then need to distribute the negative sign on the right side before starting to simplify further but, we don't need to.

So add the like term like this:
#3x^2+9x^2=12x^2#
#-5x+2x=-3x#
#-5+1=-4#

Now, you put it in standard form of highest degree to lowest degree.

#12x^2-3x-4#