How do I remember the area of a circle if it's not in the formula book?

I tend to use rhymes to remember difficult maths formulas - it makes life so much easier! For example, "I never knew how much I cared that the area of a circle is πr²". 

MP

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What are the solutions to x^2+3x+2=0


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factorise 2x^2 - x - 6