Question

20-[30-(5-1)^2]

Answer 1

\(20-\left[30-\left(5-1\right)^2\right]\)

\(=20-\left[30-4^2\right]\)

\(=20-\left[30-16\right]\)

\(=20-14\)

\(=6\)

Answer 2

\(20-\left[30-\left(5-1\right)^2\right]\)

\(=20-\left[30-4^2\right]\)

\(=20-\left[30-16\right]\)

\(=20-14\)

\(=6\)

Answer 3

\(20-\left[30-\left(5-1\right)^2\right]\)

=\(20-\left[30-16\right]=20-14\)

=\(6\)