Question

Find the sum of the polynomials. (3x3 + 4x2 - 2x + 1) + (x4 - x3 + 5x2 + 2x + 3) A. x4 + 2x3 + 9x2 - 4x + 4 B. x4 + 4x3 + 9x2 + 4 C. x4 + 2x3 + 9x2 + 4x + 4 D. x4 + 2x3 + 9x2 + 4

Answer 1

$3 x^{3} + 4 x^{2} -2x + 1 + x^{4} - x^{3} + 5 x^{2} + 2x +3 = x^{4} +2 x^{3} + 9 x^{2} + 4$

Hence, the answer is D.