7^3 = ?
Answer and explanation
343
7 × 7 × 7 = 343
Subjects
Powers & roots
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Sample exercises
√1849 = ?
Answer and explanation
43
43 × 43 = 1849
∛(17576) = ?
Answer and explanation
26
(26)³ = 17576
Study notes
Evaluate powers
The exponent counts factors, not additions.
Grades 6–9Principal square roots
The principal square root is non-negative.
Grades 6–9Cube roots
Negative numbers have negative real cube roots.
Grades 8–10Multiply powers of one base
Add exponents only when multiplying the same base.
Grades 8–10Divide powers of one base
Subtract exponents; the base must not be zero.
Grades 8–10Powers & roots · Formula sheet
Rules, conditions and small examples in one printable reference.
Grades 6–8Powers & roots · Formula sheet
Rules, conditions and small examples in one printable reference.
Grades 9–10Exponent rules with the missing conditions
Read the domain restrictions, especially around zero and fractional powers.
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