Let x = root 5 + 2 and y be its rationalising factor. Find the value of y

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[outer venture]

Let x = root 5 + 2 and y be its rationalising factor. Find the value of y

[quasi latch]

do you know what conjugate means

[summer hatch]

The rationalizing is the number that you multiply to get a rational number

There are many rationalizing factors, one of them is using difference of squres

We can say that $y=\sqrt{5}-2$ since $x\cdot y=(\sqrt{5}+2)(\sqrt{5}-2)=5-4=1$

[molten silo]

TheVinkler

[outer venture]

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