(1B) The product $(a+b)(c+d)$
Practice
Expand and simplify.
*Write your answers with powers of $x$ in descending order. $\left(\square x^2 \pm \square x \pm \square\right)$
$\left(x+2\right)\left(x+5\right)$
$\left(x-1\right)\left(x+6\right)$
$\left(x+5\right)\left(3-x\right)$
$\left(-x+3\right)\left(-7+x\right)$
$\left(6-x\right)\left(x+1\right)$
$\left(2+x\right)\left(x-3\right)$
$\left(-1+x\right)\left(-7+x\right)$
$\left(6+x\right)\left(5-x\right)$
$\left(-3x+7\right)\left(-5x+4\right)$
$\left(4x-3\right)\left(9x+2\right)$
$\left(-3x+2\right)\left(5-2x\right)$
$\left(5x+4\right)\left(1+4x\right)$
$\left(1+7x\right)\left(2x-7\right)$
$\left(-6+5x\right)\left(x-8\right)$
$\left(7-4x\right)\left(1-3x\right)$
$\left(-7+4x\right)\left(-6+x\right)$