Question

What is the standard form of `y= (-1/9x+2/49x^2)(7x-18)`?

Answer 1

`color(brown)(=> (2/7)x^3 - (667/441)x^2 + 2x`

Explanation:

`y = (-(x/9) + (2x^2)/49) * (7x - 8)`

`=> -(7x^2)/9 + (2x^3)/7 + 2x - (36x^2) / 49`

`=> (2x^3)/7 -((7x^2)/9 + (36x^2)/49) + 2x`

`=> (2x^3)/7 - ((343x^2 + 324x^2)/441) + 2x`

`color(brown)(=> (2/7)x^3 - (667/441)x^2 + 2x`