What substitution should be used to rewrite 16(x^3 + 1)^2 - 22(x^3 + 1) -3=0 as a quadratic equation?

1) u=(x^3)
2) u=(x^3+1)
3) u=(x^3+1)^2
4) u=(x^3+1)^3

"2"

Step-by-step explanation:

The quadratic equation has the form:

Looking at the expression given, if we can replace "(x^3 + 1)" with another variable, such as u, then it will create a quadratic equation in the form shown above.

Let's replace "(x^3 + 1)" with u and check if it creates a quadratic:

yes, this works because the equation we got in u falls in the quadratic category.

Answer choice 2 is right.

answer: all of the odd numbers were opened

the first person was the one that was opening all of the lockers. since one is odd, this causes all of the odd number lockers to be opened in the end.