How do you simplify $(9xy^7)^2$ ?

Question

1841 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2017-02-19T09:19:15

$(9xy^7)^2= 81 x^2y^14$

Squaring a number or expression means multiplying it by itself.

$(9xy^7)^2 = (9xy^7) xx (9xy^7)$

$= 81 x^2y^14$

In the same way $(9xy^7)^3 = (9xy^7)xx(9xy^7)xx(9xy^7)$

A common error is to multiply by 2.

$(9xy^7) xx 2 = 18xy^7$ which gives a completely different result.

How do you simplify (9xy^7)^2(9xy^7)^2?