Expand the expression (3x+2)(3-2x)
9x - 6x2+ 6 - 4x-6x2 + 5x + 6
AH
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AQA GCSE higher specimen paper 1: Question 28
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The number of uniform spherical balls that can be produced from a given mass of lead is inversely proportional to the radius of the ball cubed. If 2744 balls can be made when the radius is 1mm, how many balls can be made when the radius is 1.4mm ?