What is the simplest form of the expression 6x (x - 4) - 16x2 - (9x - 1)

Use distributie property which is

a (b+c) = ab+ac

therefor

6x (x-4) = 6x^2-24x

distribute the negative 1 infroont of the (9x-1)

-1 (9x-1) = - 9x+1

now we have

6x^2-24x-16x^2-9x+1

gropu like terms

6x^2-16x^2-24x-9x+1

add like terms

-10x^2-33x+1 is simplest form