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Pure Maths A Level Questions and Answers 100% Pass
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Gradient y2-y1/x2-x1 Length of a line sqrt((x2-x1)^2+(y2-y1)^2) Midpoint (x1+x2/2, y1+y2/2) How do you know if two lines are perpendicular? When you multiply the gradients together they should equal -1. The general rule is perpendicular = -1/m. Or you could use Pythagoras to show there is a right angle How do you know if two lines are parallel? The gradients should be the same What should you always remember when finding the square roots? The answer could be positive or negative What is the quadratic formula? x = (-b ± √b^2 - 4ac)/2a (will get 2 answers)
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Pure Maths A Level
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Pure Maths A Level
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