A) Show that the equation 20-x^3-7x^2=0 can be rearranged to give x=20/x^2 - 7 b) using xn+1 = 20/x^2 - 7 with x0 = -9 find the values of x1, x2 and x3
C) explain what the values of x1, x2 and x3 represent

Step-by-step explanation:

a)

b)

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c) approximation to the location of one of the roots of the equation.  Each iteration gives a slightly more accurate value of a root .

b

step-by-step explanation:

a difference is the result of subtraction. while each of these expressions has subtraction in it, a difference will be the result when subtraction is the last operation applied in the order of operations for the expression. this means subtraction must be outside of the parenthesis. only b has this.