Question

x.(10-x).(5x-25)

Answer 1

=(10x-x^2)(5x-25)

=50x^2-250x-5x^3+25x^2

=-5x^3+75x^2-250x

Answer 2

`@` `\text {Ans}`

`\downarrow`

`x(10-x)(5x-25)`

`= (10x-x^2)(5x-25)`

`= 10x(5x-25) - x^2(5x-25)`

`= 50x^2-250x - 5x^3 + 25x^2`

`= -5x^3+75x^2-250x`