Math, asked by kumkumbhardwaj, 10 months ago

.If | 2x 3 -5 x |=| 4 3 -5 8 | the negative value of x (A) +-4 (B) -4 (C) 4 (D) 0​

Answers

Answered by hukam0685
1

Step-by-step explanation:

Given that:

\left|\begin{array}{cc}2x&3\\-5&x\end{array}\right|=\left|\begin{array}{cc}4&3\\-5&8\end{array}\right|\\

To find: Negative value of x

Solution: To find Negative value of x,first one have to solve(open) the determinant from both sides

2 {x}^{2}  + 15 = 32 + 15 \\  \\ 2 {x}^{2}  = 32 \\  \\  {x}^{2}  =  \frac{32}{2}  \\  \\  {x}^{2}  = 16 \\  \\ x =  \sqrt{16}  \\  \\ x =  +  - 4 \\  \\

Here x have two values x= 4 and x=-4.

So, negative value of x is -4.

Option B is correct.

Hope it helps you.

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