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Question
Simplify the following
`(7.83 + 7.83 - 1.17 xx 1.17)/6.66`
Solution
We have
`(7.83 + 7.83 - 1.17 xx 1.17)/6.66`
`= ((7.83 + 1.17)(7.83 - 1.17))/6.66` `[∵ (a^2 - b^2) = (a + b)(a - b)]`
`= ((9.00)(6.66))/(6.66)`
= 9
`∴ (7.83 xx 7.83 - 1.17 xx 1.17)/6.66 = 9`
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