Subtract 3 from 30 gets you 27 then subtract 27-3 which equals 24 and so on
To solve this, we have to complete the square of
To do this with halve the and get rid of the x, then get rid of the power on , and then put them all in brackets, and the square the bracket, like so:
becomes
However does not equal
If we expand we get instead.
So to make it equal, all we do is subtract 1.
So when we complete the square of , we get
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So becomes:
x + 1 = ±√6
x = -1 ± √6
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Answer:
x = -1 ± √6