3. Equations and Inequalities
iGCSE (2021 Edition)
3.04 Quadratic formula
Interactive practice questions
Solve $x^2+5x+6=0$x2+5x+6=0 for $x$x by using the quadratic formula or otherwise.
Enter each solution on the same line, separated by a comma.
Easy
2min
Solve $-6+7x+5x^2=0$−6+7x+5x2=0 for $x$x by using the quadratic formula or otherwise.
Enter each solution on the same line, separated by a comma.
Easy
4min
Solve $4x^2+7x+3=0$4x2+7x+3=0 for $x$x by using the quadratic formula or otherwise.
Enter each solution on the same line, separated by a comma.
Easy
2min
Solve $4x^2-17x-15=0$4x2−17x−15=0 for $x$x by using the quadratic formula or otherwise.
Enter each solution on the same line, separated by a comma.
Easy
3min
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