A level Maths Questions and Answers 100% Pass
if two lines are perpendicular, what must their gradients equal to when multiplied together? - 1 What is the equation to calculate the gradient of a line? y₂-y₁/x₂-x₁ What is the equation to calculate the length of a line? √(y₂−y₁)^2 + (x₂-x₁)^2 What is the equation to calculate the midpoint of a line? (x₂+x₁) over 2 , (y₂+y₁) over 2 What is the equation of a circle? x²+y²=r² How do you find the midpoint of a circle from the equation? (x-a)²+(y-b)²=r² If a factor of a line equation is (x-2)², or the line equation is just y=(x-2)², how many solutions does (x-2)² give and what does this look like on a graph. This gives just one solution, that x=2. This means that the line just touches the x axis at (2,0)
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a level maths questions and answers 100 pass