Mathematics

Quadratic Equations

Solving by factorisation, completing the square, quadratic formula, and nature of roots.

Sample Practice Questions

3 questions shown — tap “Show Answer” to check yours.

Easy

The roots of x² − 7x + 12 = 0 are:

A3, 4

B−3, −4

C2, 6

D1, 12

Easy

The discriminant of 2x² − 4x + 3 = 0 is:

A−8

C16

D−16

Medium

For what value of k does the equation x² + kx + 4 = 0 have equal roots?

Ak = ±2

Bk = ±4

Ck = 4 only

Dk = −4 only

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