Question

X cube+6x-16=0

find all solutions by factoring.
answers
(-2,8)
(-8,2)
(2,8)
(-8,-2)
​

Answer 1

Option b] (2,-8)

Explanation:

⇒ x³ + 6x - 16 = 0

♦ the value of one root is irrational and other two are complex roots.

⇒ x² + 6x - 16 = 0

⇒ (x + 8)(x - 2) = 0

⇒ x = 2 , -8

Answer 2

(b) {-8, 2}

Explanation:

The given equation

x³ +6x -16 = 0

cannot be factored in integers. It has one irrational real root near x=1.759, and two complex roots.

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Perhaps you want to factor ...

x² +6x -16 = 0

(x +8)(x -2) = 0

This has solutions x = -8 and x = 2 that make the factors be zero.

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Additional comment

"Cubed" refers to an exponent of 3.