**Re: maths questions help**

If you know a place where the polynomial is positive and another place where it is negative (and the root you already found does not lie between these two places), then the other root lies between these two numbers. You can then use the bisection method (check your textbook if you haven't learnt it yet).The graph of y = x^4 - 2x - 12 has 2 x-intercepts

a. construct a table of values for this polynomial rule for x = -3,-2,-1,0,1,2,3

b. Hence state an exact solution to the equation x^4 - 2x - 12 = 0

c. State an interval within which the other root of the equation lies and use the methods of bisection to obtain an estimate of this root correct to 1 decimal place

I get how to do part a and b, but i'm finding part c extremely challenging and confusing.