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Question
If `|(x, 2),(18, x)| = |(6,2),(18,6)|`, then x is equal to ______.
Options
6
±6
−6
0
Solution
If `|(x, 2),(18, x)| = |(6,2),(18,6)|`, then x is equal to ±6.
Explanation:
`abs ((x, 2),(18, x)) = abs ((6,2),(18,6))`
`x^2 - 36 = 36 - 36`
`x^2 = 36`
`x = pm 6`
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