Practicing Success

Target Exam

CUET

Subject

General Test

Chapter

Quantitative Reasoning

Topic

Algebra

Question:

If $ 1 + x^2 + x^4 = 585$ and $ 1 - x + x^2 = 65$, then find the value of $ 1 + x + x^2$.

Options:

8

7

6

9

Correct Answer:

9

Explanation:

If $ 1 + x^2 + x^4 = 585$

$ 1 - x + x^2 = 65$,

then find the value of $ 1 + x + x^2$

We know that,

x4 + x2y2 + y4 = (x– xy + y2) (x2 + xy + y2)

So, $ 1 + x + x^2$ = \(\frac{585}{65}\) = 9