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Question

If 532+3=x+y3, then



A

x = 13, y = -7

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B

x = -13, y = 7

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C

x = -13, y = -7

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D

x = 13, y = 7

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Solution

The correct option is B

x = 13, y = -7


532+3=x+y3

532+3=(53)(23)(2+3)(23)

                                              (Rationalising the denominator)

=105323+3(2)2(3)2=137343

=13731=1373

1373=x+y3

Comparing, we get

x = 13, y = -7


Mathematics
RD Sharma
Standard IX

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