Question

− 1 c 2 ( 9 c − 4 ) ( c − 5 )

Answer 1

(-9c³+4c²)(c-5) = -9c⁴+45c³+4c³-20c² = -9c⁴+48c³-20c²

Answer 2

To simplify the expression, let's first expand the given expression:

$-\frac{1}{c^2} \cdot (9c - 4) \cdot (c - 5)$

Now, multiply the expressions inside the parentheses:

$-\frac{1}{c^2} \cdot (9c^2 - 5c - 4c + 20)$

Combine like terms:

$-\frac{1}{c^2} \cdot (9c^2 - 9c + 20)$

Now distribute the $-\frac{1}{c^2}$ to each term inside the parentheses:

$-\frac{1}{c^2} \cdot 9c^2 + \frac{1}{c^2} \cdot 9c - \frac{1}{c^2} \cdot 20$

Finally, simplify each term:

$-9 + \frac{9}{c} + \frac{20}{c^2}$

So, the simplified expression is $-9 + \frac{9}{c} + \frac{20}{c^2}$.