Sydney was asked whether the following equation is an identity: (2x^2-18) (x+3) (x-3) = 2x^4-36x^2+162

Question

Daniela Brock

Mathematics

11 June, 06:33

Sydney was asked whether the following equation is an identity: (2x^2-18) (x+3) (x-3) = 2x^4-36x^2+162

+4

Answers (2)

Know the Answer?

Tamia Randolph · Answer 1

Yes it is.

See below.

Step-by-step explanation:

(2x^2-18) (x+3) (x-3)

= (2x^2 - 18 (x^2 - 9)

= 2x^4 - 18x^2 - 18x^2 + 162

= 2x^4 - 36x^2 + 162.

The left side transforms to the right side so it is an identity.

Francesca Simpson · Answer 2

Any value of x x makes the equation true. All real numbers Interval Notation: ( - ∞, ∞).