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  • Provide solution for RD Sharma maths class 12 chapter Determinants exercise multiple choise question 22

Provide solution for RD Sharma maths class 12 chapter Determinants exercise multiple choise question 22

Answers (1)

Answer:

Correct option (c)

Hint:

Solve both determinants then equating them, we get required value of x

Given:

Here

        \begin{vmatrix} 2x &5 \\ 8 &x \end{vmatrix}=\begin{vmatrix} 6 &-2 \\ 7 &3 \end{vmatrix}

We have to find the value of x.

Solution:

Here

        \begin{vmatrix} 2x &5 \\ 8 &x \end{vmatrix}=\begin{vmatrix} 6 &-2 \\ 7 &3 \end{vmatrix}

        \Rightarrow 2x^{2}-40=18+14

        \Rightarrow 2x^{2}=32+40

        \Rightarrow 2x^{2}=72

        \Rightarrow x^{2}=36

        \Rightarrow x=\pm 6

This is the required answer.

Posted by

Gurleen Kaur

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