Question

Which of the following is equivalent to the expression below?

(-k+8)(-2k²-8k-1)

A)2k³-8k²-63k-8
B)2k³-24k²-64k-8
C)-8k^4 +2k³+64k-8
D)-24k^4-2k³-64k²-8

Answer 1

A

Explanation:

(-k + 8)(-2k² - 8k - 1)

We can use FOIL to solve this.

(-k * -2k²) + (-k * -8k) + (-k * -1) + (8 * -2k²) + (8 * -8k) + (8 * -1)

2k³ + 8k² + k + (-16k²) + (-64k) + (-8)

2k³ - 8k² - 63k - 8

Best of Luck!