Question

if x-2 is a zero of x^3+kx^2-8 find k

Answer 1

Answer:

If x-2 is a factor then x-2=0

X=2

Putting the value of x in the equation P(x)=x3-4x2-kx-8

P(2)=(2)3-4(2)2-k(2)-8

P(2)=8-16-2k-8

We know that 2 is a factor therefore the whole equation will be equal to zero on putting the value of x as 2

P(2)=8-16-2k-8=0

=-16-2k=0

-2k=16

k=16/-2

k=-8

Your answer

Answer 2

Answer:

${ \huge\fbox \pink {♥}\fbox \blue {A} \fbox\purple {N} \fbox \green{S} \fbox \red {W} \fbox \orange {E} \fbox{R} \fbox \gray{♥}}$precipitation reaction refers to the formation of an insoluble salt when two solutions containing soluble salts are combined. The insoluble salt that falls out of solution is known as the precipitate, hence the reaction's