Question

Given the polynomial 2x3 + 18x2 - 18x - 162, what is the value of the coefficient 'k' in the factored form?

2x3 + 18x2 - 18x - 162 = 2(x + k)(x - k)(x + 9)

Answer 1

so look at the constant term

\[-162 = 2 \times k \times (-k) \times 9\]

just solve for k...

hope this helps

Answer 2

I don't know how

Answer 3

ok... so you have

\[-162 = -18k^2\]

solve for k...

Answer 4

so divide both sides of the equation by -18

then take the square root

Answer 5

3=k? @campbell_st

Answer 6

well its + or - 3... but it works for your problem as 3..

Answer 7

Okay Thank You so much!!!

Answer 8

@Monster1234 help

Answer 9

hold on a sec while I work it out @Law&Order

Answer 10

thx ;)

Answer 11

i know this 2(x^3+9x^2-9x-81)

Answer 12

do you want the answer to that?

Answer 13

yeah i guess

Answer 14

k