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It is a quadratic equation in the variable x.
No. It is an equation. A function would link the variable x to another variable - possibly denoted by y. It is a relationship between two (or more) variables.
It is one number or variable squared subtracted from another Such as x^2-y^2 since this factors as (x-y)(x+y)
No, if there is a sqaured variable, the equation is not linear.
depending on your number's you plug them in differently.there is no real formula or equation for writing a polynomial.let's say you have the number; 8. & the variable; x(squared).you would get the polynomial: 8x(squared).you're pretty much just placing the number & variable together.hope that helped!(: