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Write an algebraic expression to show the area of a square with side length x+4

x²+ 8x + 16

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A different pattern is made using 20 straight lines and 16 arcs. The straight lines and arcs are made of metal. 20 straight lines cost £12 and the cost of one straight line: cost of one arc = 2:3. Work out the total cost of metal in the pattern.

what is 64 to the power of 2/3?

Factorise 3xy+6x^2

Expand (x + 4) (x - 8)

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