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