Question

Match the following expressions with their products.

• A. $18x^2+9x$
• B. $18x^{3}y$
• C. $-12x^2$

Answer 1

Case 1:
$(2x+1)\times \left(9x\right)$
$=(2x\times 9x)+(1\times 9x)$
$=18x^2+9x$

Case 2:
$\left(3x\right)\times (-4x)$
$=3\times x\times (-4)\times x$
$=-12x^2$

Case 3:
$6x^{2}y\times 3x$
$=6\times 3\times x^{2}y\times x$
$=18x^{3}y$