The diagram shows a sequence of three squares made with matches. Work out the rule to give the number of matches needed to make the nth square in the sequence.

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Step-by-step explanation:

Notice that each time we add a an odd number of squares  to create a new square

each time we add an odd number we create a perfect square

a perfect square.

A perfect square is written as:

to get the first square we replaced n with 1, to get the second one we replaced it with two and so on ...

So the formula is:

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225

24/56=hx^7

step-by-step explanation: