Simplify the polynomial.
−3x2+6+2x−5x+4x2+9
(1 point)
Responses
−x2+3x+15
negative x squared plus 3 x plus 15
7x2+3x+3
7 x squared plus 3 x plus 3
x2−3x+15
x squared minus 3 x plus 15
−x2+7x+15
1 answer
negative x squared plus 7x plus 15