Question

213.7²-67.49+7²

Answer 1

\(213\cdot7^2-67\cdot49+7^2\)

\(=213\cdot7^2-67\cdot7^2+7^2\)

\(=7^2\cdot\left(213-67+1\right)\)

\(=7^2\cdot147\)

\(=49\cdot147\)

\(=7203\)

Answer 2

`= 7^2(213-67+1)`

`= 7^2 . 147`

`= 7203`