Question

The expression (y-20)(y5)3 is equivalent to ya. What is the value of a?

Answer 1

y¹⁵-20y¹⁴

Explanation:

I'm going to assume that your problem looks like this

`(y-20)(y^5)^3`

`(x^n)^y=x^(n*y)`

which means we have

`(y-20)*y^(15)\\\\y^(16)-20y^(15)=ya\\\\*y^(15)-20y^(14)=a`