In Mathematics / College | 2025-08-20

Consider these quadratic expressions:
A. $-3 x^2+11 x-3$
B. $11 x^2-x+10$
C. $4 x^2+27 x-28$
D. $-3 x^2+11 x+31$

For each polynomial operation, write the letter that corresponds to the resulting expression from the list.

$\left(5 x^2+2 x+1\right)+\left(6 x^2-3 x+9\right)$ is equivalent to expression $\square$ .
$\left(-3 x^2+6 x-12\right)+(5 x+9)$ is equivalent to expression $\square$
$(8 x+16)-\left(3 x^2-3 x-15\right)$ is equivalent to expression $\square$ .
$\left(5 x^2+23 x-7\right)-\left(x^2-4 x+21\right)$ is equivalent to expression $\square$ .

Asked by p8qvkpvb9h