Multiply:
$\left(100Y^{2}- 70Y + 49 \right)(10Y+7)$
F(x) = $x^{3}$ + $x^{2}$ - x + 2
and
G(x) = $x^{2}$ + 5
What is ?
(FG)(x) = $x^{5}$ + $x^{4}$ - x - 2
(FG)(x) = $x^{5}$ + $x^{4}$ $+4x^{3}$ + $7x^{2}$ - 5x +10
(FG)(x) = $x^{3}$ - x - 3
(FG)(x) = $x^{5}$ + $x^{4}$ - $x^{3}$ + $2x^{2}$ - 5x -10
(FG)(x) = $x^{3}$ + $2x^{2}$ - x + 7
?