Answer:
option A is correct
Step-by-step explanation:
We simplify the given options
(a) (x^2-5x+13)+(x^2+3x-6)
combine like terms
\(x^2-5x+13+x^2+3x-6\)
\(2x^2-2x+7\)
(b)(4X^2-6X+11)+(2X^2-4X+4)
combine like terms
\(4x^2-6x+11+2x^2-4x+4\)
\(6x^2-10x+14\)
(c) (5X^2-8X+120)+(-3X^2+10X-13)
combine like terms
\(5x^2-8x+120-3x^2+10x-13\)
\(2x^2+2x+107\)
