What if my equation doesn't factorise?
For all quadratic equations, you can use the quadratic formula. Given an equation of the form ax2+bx+c, you can plug those values into this formula:x1, x2 = (-b +/- sqrt(b2 - 4ac)) / 2aNote: the term b2 - 4ac is called the determinant and must be greater than 0 for your equation to have any solutions.
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What is the expansion of (x + 4)(x - 5) ?
Factorise the expression given
a) Find the equation of the line that passes through (2,10) and (4,16) b) Find the point where the line in (a) intersects the line y=5x-2