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CUET
General Test
Quantitative Reasoning
Algebra
If 2x + y = 6 and xy = 4, then find the value of $8x^3 + y^3 $ is :
64
72
48
16
Given,
2x + y = 6
and xy = 4
Put x = 1 and y = 4, then the condition is satisfied.
8x3 + y3
= 8 × 13 + 43
= 8 + 64 = 72
