2x^2 - 16x + 32

Solution: x=4. This can be shown by factorisation or applying the quadratic formula.

NO

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The line AB has equation 3x +5y = 7 . Find the gradient of AB.


How do I think of coordinates of a point?


f(x) = 3x - 2a || g(x) = 2ax + 1 || fg(x) = 2x + b/2


Make y the subject of the formula: p = √x+y/5