Question

what use is finding roots of a polynomial. How is it important to find where the function cuts the x axis ?

Answer 1

it is where the function crosses the x axis

Answer 2

and when i say where I mean x value

Answer 3

@rsadhvika it may seem unnecessary but when you get into a higher grade. You'll get to know. In Physics we encounter problems whose solutions involves finding roots of a polynomial like solving a projectile's equation

Answer 4

the roots of a polynomial (especially quadratic equations) are the x-intercepts

x-intercept is found by putting y to zero and solving for x

finding the roots is also done the same way

so in a way you can say the roots are the x-intercepts themselves

i assume you are familiar with the x-intercept yes @rsadhvika ? x-intercept *is* where the graph crosses the x-axis

Answer 5

reference to @lgbasallote . Please note @rsadhvika .

Answer 6

the roots of a polynomial show where it changes from positive to negative of vice versa.

Answer 7

what happens when you unknowingly ask a bunch of math nerds an ambiguous question about math?

Answer 8

thanks everyone i understand it better now xD
one view is to think of it as when a function changes direction from positive to negative and vice versa i get it xDDD

lol its not an ambiguous question i hope. almost all algebra2 is about finding roots and factoring only !!! its amazing they dont tell how it is useful and keep giving so many problems to solve