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SSC CHSL 2023 PYQ — Question 74

SSC CHSL - 17 Aug 2023 - Shift 2 • Quantitative Aptitude • Q74

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Simplify (3x−2y) (3x+2y) (9x2+4y2)

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Correct answer: D

Explanation

The correct answer is option 4 i.e. 81x4 − 16y4.

(3x − 2y)(3x + 2y) = (3x)2 − (2y)2 = 9x2 − 4y2

(9x2 − 4y2)(9x2 + 4y2) = (9x2)2 − (4y2)2 = 81x4 − 16y4