Radical — Grade 7 Math, what it means and where it is taught
The √ symbol, and the expression under it.
Taught in Grade 7 Math.
Where it is taught
What uses it later
This idea is needed for:
- Radicand — The number under the radical sign.
- Rationalise — Clear a radical out of a denominator.
Practise this idea
1 question in the course bank use Radical, in Radical Functions & Equations.
Problem 1
Solve 2√x-1 = 9.
Worked answer
25
2√x=10
√x=5
x=25