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प्रश्न
If ` x in N and |[x+3,-2],[-3x,2x]|=8` , then find the value of x.
उत्तर
`|[x+3,-2],[-3x,2x]|=8`
⇒(x+3)2x−(−2)(−3x)=8
⇒2x2+6x−6x=8
⇒2x2=8
⇒x2−4=0
⇒x2=4
⇒x=2 [x ≠ -2 ∵ x ∈ N]
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