
Taking the square root of both sides gives two possible cases,

or

Recall that

If
and
, we have

so in the equations above, we can write

Then in the first case,


(where
is any integer)


and in the second,




Then the solutions that fall in the interval
are

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Answer:
thanks
Step-by-step explanation:
What kind of problems or what are you trying to ask?
Formula:
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<span>Note: , where nPr is the formula for permutations of n objects taken r at a time.</span>
</span>
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Example:
<span>How many different committees of 4 students can be chosen from a group of 15?
</span>
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Answer:
<span>There are possible combinations of 4 students from a set of 15.</span>
</span>
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<span>
There are 1365 different committees.</span></span></span>