Question

is (-2) a root of quadratic equation 2x^2+x-3 =0 ?

Answer 1

Answer:

No.. A root is a value which satisfies the equation but here putting - 2 in place of x gives 3 which was supposed to be 0.

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Answer 2

${2x}^{2} + x + - 3 = 0 \\ 2 {x}^{2} - 2x + 3x - 3 \\ 2x (x - 1) + 3(x - 1) \\ (2x + 3)(x - 1)$

–2 is not the root of the above Q.E.

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