Write solution set of equation {x^2} + x - 2 = 0 in roster form.

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1.Set Theory

easy

Write the solution set of the equation ${x^2} + x - 2 = 0$ in roster form.

A

$(1,-2)$

B

$(1,-2)$

C

$(1,-2)$

D

$(1,-2)$

Solution

The given equation can be written as

$\left( {x – 1} \right)\left( {x – 2} \right) = 0,$ i.e., $x=1,-2 $

Therefore, the solution set of the given equation can be written in roster form as $\{ 1, – 2\} $

Standard 11

Mathematics

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