4.3 Homework: factoring expressions

${\mathrm{3x}}^3+\text{15}{x}^2+\text{18}x$

Check your answer by multiplying back.

$x^2-\text{12}x+\text{32}$

Check your answer by plugging the number 4 into both my original expression, and your factored expression. Did they come out the same?

Is there any number $x$ for which they would not come out the same?

$x^2-\mathrm{4x}-\text{32}$

${\mathrm{x8}}^2-\text{18}{y}^4$

$x^2+\text{18}x+\text{32}$

$x^2-\text{18}x+\text{32}$

${\mathrm{2x}}^2+\text{12}x+\text{10}$

$\text{100}{x}^2+\text{8000}x+\text{1000}$

$x^2+\mathrm{4x}-\text{32}$

$x^4-y^4$

$x^2+\text{13}x+\text{42}$

$x^2+\text{16}$

${\mathrm{4x}}^2-9$

${\mathrm{3x}}^2-\text{48}$

${\mathrm{2x}}^2+\text{10}x+\text{12}$

$x^2-9$

${\mathrm{2x}}^2+\text{11}x+\text{12}$