Question

Expand and state your answer as a polynomial in standard form.
(3x^{5}-y^{4})^2

Answer 1

`9x^(10) - 6 x^5 y^4 + y^8`

Explanation:

`(3x^(5) - y^(4))^(2)`

(a - b)^2 = a^2 - 2ab + b^2

(3x^5 - y^4)^2 = (3x^5)^2 - 2 * (3x^5) * (y^4) + (y^4)^2 =

= 9x^10 - 6 * x^5 * y^4 + y^8