\( \sqrt {{\rm{25}}{{\rm{x}}^{\rm{2}}}}\)

\(5 x\)

Explanation

\( \sqrt {{\rm{25}}{{\rm{x}}^{\rm{2}}}} = {\rm{ }}\sqrt {{{\left( {{\rm{5x}}} \right)}^2}} = {\rm{ 5x}}\)

\( \sqrt {81{x^2}}\)

If x = 3, then \(x^{x} (x) = \)

If a = 4 and b = -6, what is the value of the expression \(- {a^3} - {a^2}b + 7{b^2} - ab + 9?\)

If \(\frac{0.08}{\text{ x}} = 1\), then x =

Which of the following is not a synonym for \( {9^3}\)?