Evalute the determinants in queations 1 and 2 : If `|{:(x,2),(18,x):}|=|{:(6,2),(18,6):}|`, then x is equal to : (a) 6 (b) `+-6` ( c) -6 0
Evalute the determinants in queations 1 and 2 :
If `|{:(x,2),(18,x):}|=|{:(6,2),(18,6):}|`, then x is equal to :
(a) 6
(b) `+-6`
( c) -6
0
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1 Answers
(b) `|{:(x,2),(18,x):}|=|{:(6,2),(18,6):}|`
`rArr" "x^(2)-36=36-36`
`rArr" "x^(2)=36`
`rArr" "x=+-6`
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