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# Square root

6 apples in one bag. We need many, so we’ll take six bags each:

$$6\cdot 6=6^2=36$$

At home, when your family says ‘that’s a lot of apples. How many were there in a bag?’ then you can maybe not remember the number. But you do remember that it was something squared! ‘Some number’ squared gives 36 apples. If we symbolise this ‘some number’ with a letter, say $x$ for now, then we are looking for this unknown $x$, which squared gives 36 apples:

$$x^2=36$$

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