(A) The given equation is $x^2 + x - 2 = 0$. Factorizing the quadratic equation: $x^2 + 2x - x - 2 = 0$ $x(x + 2) - 1(x + 2) = 0$ $(x - 1)(x + 2) = 0$

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(A) The given equation is $x^2 + x - 2 = 0$. Factorizing the quadratic equation: $x^2 + 2x - x - 2 = 0$ $x(x + 2) - 1(x + 2) = 0$ $(x - 1)(x + 2) = 0$ Thus,the roots are $x = 1$ and $x = -2$. Therefore,the solution set in roster form is $\{1, -2\}$.

Class 11 Mathematics Set Theory Basic of Set theory

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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
$\{-1, -2\}$

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

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Let $A = \{1, 2, \{3, 4\}, 5\}$. Which of the following statements is incorrect and why? $\{ \{ 3, 4\} \} \subset A$

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