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, x= (-b +/- sqrt(b- 4ac)) / 2aNote: the term b- 4ac is called the determinant  and must be greater than 0 for your equation to have any solutions.

Answered by Hayden M. Maths tutor

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Solve the following simultaneous equations: 3x + y = 11, 2x + y = 8


Insert one pair of brackets so that this calculation is correct; 3 x 6 + 5 - 1 = 32


How do I differentiate?


Make y the subject of the formula x=(2y-1)/(4-y)


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