Sorry I know I’m asking a lot of questions but what is Simplify - n x 8 x n

-8n²

first multiply - on n times + on n = -n² ,then multiply by 8,it gives-8n²

the infinity sign

step-by-step explanation:

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so: