Question

If you are subtracting (3x2 + x) - (-2x2 + x), which of the following choices correctly adds the opposite of the second polynomial? (1 point) A A (3.x² + x) - (2x - x) B (3.rº + r) + (2x2 + x) C (3x2 + x) + (-2x2 – x)D (3.2? + x) + (2x2 – x) .

Answer 1

The given expression:

$(3x^2+x)-(-2x^2+x)$

Open the brackets:

$\begin{gathered} (3x^2+x)-(-2x^2+x) \\ (3x^2+x)-(-2x^2+x)=(3x^2+x)+2x^2-x \\ (3x^2+x)-(-2x^2+x)=(3x^2+x)+(2x^2-x) \end{gathered}$

Answer: D)

$(3x^2+x)+(2x^2-x)$