How to solve a quadratic equation?
There are several ways to solve a quadratic equation. 1.Quadratic formula ax2 + bx + c = 0, where a can't equal 0 but b and c can.x = (-b± (b2 - 4ac)) / 2a2. completing the square(x + b/2)2 + c3. factorising by eye
The solution (x) gives the turning point of the curve where the gradient is equal to 0.
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Q) The equation of a curve is y=(x+4)^2+7. Find the co-ordinates of the turning point
The point P has coordinates (3, 4) The point Q has coordinates (a, b) A line perpendicular to PQ is given by the equation 3x + 2y = 7 Find an expression for b in terms of a.