Question

what is the sum of x2+4x-3 and x+5x+6? A. 2x2+9x+4 B. 2x2+9x+8 c. x2+9x+4 d. x2+9x+8

Answer 1

$(x^2+4x-3)+(x^2+5x+6)=(x^2+x^2)+(4x+5x)+(-3+6)\\\\=\boxed{2x^2+9x+3}$