5. Find the LCM and GCD for 21x²y, 35xy2and verify that
f(x)xg(x) = LCMxGCD.
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Solution :-
LCM : Least common multiple
GCD : greatest common divisor
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21 yx^2 = 3 × 7 × y × x × x
35 xy^2 = 5 × 7 × x × y × y
- LCM = 3 × 5 × 7 × y × y × x × x
- LCM = 105 x^2 y^2
- GCD = 7 × x × y = 7 xy
______________________________
we have to verify
that
21 y x^2 × 35x y^2 = LCM × GCD
LHS = 21 yx^2 × 35 xy^2
LHS = 735 x^3 y^3
RHS = LCM × GCD
RHS = 105 x^2 y^2 × 7 x y
RHS = 735 x^3 y^3
LHS = RHS
verified.
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