If |x| + 3 = 9, then x = ?
2 answers:
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If a polynomial is divisible by 
, then 
is a root of this polynomial.
Here (x-a) is equal to x+2:
So -2 is a root of the polynomial. That means <span>x³-6x²+kx+10</span>=0 for x=-2. Now substitute -2 for x in the equation and solve for k:
Here (x-a) is equal to x+2:
So -2 is a root of the polynomial. That means <span>x³-6x²+kx+10</span>=0 for x=-2. Now substitute -2 for x in the equation and solve for k:
Given equation is :
=0
Taking out common we get,
=0
Now solving this we get,
As 11 is not factor-able, we will solve it using the formula,
a=1 b=5 and c=-11
we get,
and