Question

Plz help!! solve each of the polynomial equations
x^3 - 7x^2 -x +7=0

Answer 1

HI!!

Answer 2

sum of the coefficients all powers of x= 1-7-1+7
= 8-8
=0

Answer 3

therefore x-1 is a factor of above equation

Answer 4

r u there

Answer 5

sum of coefficients of odd powers of x = -1+1 =0 ------(I)
sum of coefficients of even powers of x = -7+7 =0------(II)
(I)= (II)
therefore ,x+1 is a factor of above equation

Answer 6

x-7 is another factor

Answer 7

(x-1)(x+1)(x-7)=0