Find the sum of (2x^2 +4x-9) +(3x^2-2x+10) show work

You can eliminate parentheses and combine like terms.

(2x^2 +4x-9) +(3x^2-2x+10)

= 2x^2 +4x-9 +3x^2-2x+10 . . . . . nothing needs to be distributed, so we can simply drop the parentheses

= x^2(2 +3) +x(4 -2) +(-9 +10) . . . group like terms

= 5x^2 +2x +1

what is the original number? you forgot to add it.

we would need a picture of the quadrilateral in order to answer the question. also, it seems that the question is missing some components.