Question

Is x-2 is a factor of x³-2x²-5x+4.verify.​

Answer 1

Answer:

if x-2 is a factor then x=2 must be its zero..

So if u will put x=2 in above equation..if its sum is equal to 0.. then its correct that x-2 s a factor of ur equation

Step-by-step explanation:

HOPE U UNDERSTOOD IT WELL

Answer 2

$\large{\implies{Answer}}$

If x+2 is a factor of the above cubic equation then the result after putting the values will be 0

x+2=0

x=-2

$= x {}^{3} - 2x {}^{2} - 5x + 4 \\ = ( - 2) {}^{3} - 2( -2) {}^{2} - 5( - 2 ) + 4 \\ = - 8 -2 (4) + 10 + 4 \\ = - 8 - 8 + 10 + 4 \\ = - 16 + 10 + 4 \\ = - 6 + 4 \\ = - 2$

The result is not 0 hence it is not the factor of the above equation