Question

verify that ( x-1) is a factor of polynomial (x cube + 4x -5 ) ​

Answer 1

Step-by-step explanation:

x3+4x-5

x-1=0

x=1

substitute x value in the given polynomial

(1)3+4(1)-5

1+4-5

5-5

0

Answer 2

Answer:

If x-1 is a factor.

then,

x=1 is the solution of (x cube + 4x-5)

so,

by putting the value of x=1 in the polynomial...

=x cube +4x-5

=1 cube + 4×1 - 5

= 1 +4 -5

= 5-5

=0

Since answer is 0...

This proves that x-1 is factor of polynomial..

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