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Question
Determine whether 2 is a root of quadratic equation 2m2 – 5m = 0.
Solution
The given equation is 2m2 – 5m = 0.
Putting m = 2 in L.H.S. of equation (i), we get
L.H.S. = 2 × (2)2 – 5 × (2)
= 2 × 4 – 10
= 8 – 10
= – 2
∴ L.H.S. ≠ R.H.S.
∴ 2 is not the root of a given equation.
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