Sydney was asked whether the following equation is an identity: (2x^2-18)(x+3)(x-3)=2x^4-36x^2+162
2 answers:
Answer:
Any value of x x makes the equation true. All real numbers Interval Notation: ( − ∞ , ∞ )
.
Answer:
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.
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