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Determine Whether X = -1 is a Root of the Equation X2 – 3x +2=0 Or Not. - ICSE Class 10 - Mathematics

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Question

Determine whether x = -1 is a root of the equation x2 – 3x +2=0 or not.

Solution

`x^2 - 3x + 2 = 0`

Put x = -1 in LHS

LHS = `(-1)^2 -  3(-1) + 2`

= 1 + 3 + 2 = 6 ≠ R.H.S

Then x = -1 is not the solution of the given equation.

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Solution Determine Whether X = -1 is a Root of the Equation X2 – 3x +2=0 Or Not. Concept: Quadratic Equations.
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