Question

Which polynomial represents the sum below?
3x? +7x+3
5x2 + 12x
+
O A. 15x2 + 19x+ 3
B. 8x2 + 19x+ 3
C. 8x2 + 84x + 3
O D. 15x2 + 84x + 3

Answer 1

Answer:

$8x^2+19x+3$

Step-by-step explanation:

$3x^2+7x+3+5x^2+12x=\\3x^2+5x^2+7x+12x+3=\\8x^2+7x+12x+3=\\8x^2+19x+3$