this is a GCSE top set question please help if you can!

Any square number which is even, is always a multiple of 4. explain why using algerbra(Thinking)

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- Sep 7th 2012, 11:37 AMshamrock888square numbers and algerbra. Please help!
this is a GCSE top set question please help if you can!

Any square number which is even, is always a multiple of 4. explain why using algerbra(Thinking) - Sep 7th 2012, 12:04 PMskeeterRe: square numbers and algerbra. Please help!
all even numbers can be written in the form $\displaystyle 2k$ , where $\displaystyle k$ is an integer.

so ... what can you say about $\displaystyle (2k)^2$ ?