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