But Loh’s approach solves the problem intuitively. The first step is to think that the two roots of the equation must be equal to -B/2±z = 1±z. And because their product must be C=4, we can write: ...

If roots of a quadratic equation are given, then the quadratic equation can be represented as: x 2 – (sum of the roots)x + product of the roots = 0. 8. Sum of roots = –b/a. 9.

Revise how the discriminant of a quadratic equation can be used to find the number and nature of roots. BBC Bitesize Scotland SQA National 5 Maths revision.