The value of the constant 'k' in the factored form factorization the provided polynomial equation is 3.
<h3>What is polynomial equation?</h3>
Polynomial equations is the expression in which the highest power of the unknown variable is n (n is real number).
The factor of a polynomial is the terms in linear or equation form, which are when multiplied together, give the original polynomial equation as result.
The given polynomial equation in the problem is,
![2x^3 +18x^2 - 18x - 162](https://tex.z-dn.net/?f=2x%5E3%20%2B18x%5E2%20-%2018x%20-%20162)
The factor of the polynomial equation are given as,
![2(x+ k)(x - k)(x +9)](https://tex.z-dn.net/?f=2%28x%2B%20k%29%28x%20-%20k%29%28x%20%2B9%29)
First find out the factors to compare and find the value of k.The above equation has the unknown variable x and the highest power of this unknown variable is 3.
Take out the highest common factor 2, which can divide each term of the above equation (2, 18, -18, -162). Thus,
![2(x+ k)(x - k)(x +9)=2(x^3 +9x^2 - 9x - 81)](https://tex.z-dn.net/?f=2%28x%2B%20k%29%28x%20-%20k%29%28x%20%2B9%29%3D2%28x%5E3%20%2B9x%5E2%20-%209x%20-%2081%29)
Take out the highest common factor to make the groups as,
![2(x+ k)(x - k)(x +9)=2(x^2( x+9) - 9(x + 9))\\2(x+ k)(x - k)(x +9)=2( x+9) (x^2 - 9)\\2(x+ k)(x - k)(x +9)=2( x+9) (x^2 - 3^2)](https://tex.z-dn.net/?f=2%28x%2B%20k%29%28x%20-%20k%29%28x%20%2B9%29%3D2%28x%5E2%28%20x%2B9%29%20-%209%28x%20%2B%209%29%29%5C%5C2%28x%2B%20k%29%28x%20-%20k%29%28x%20%2B9%29%3D2%28%20x%2B9%29%20%28x%5E2%20-%209%29%5C%5C2%28x%2B%20k%29%28x%20-%20k%29%28x%20%2B9%29%3D2%28%20x%2B9%29%20%28x%5E2%20-%203%5E2%29)
Use the property of difference of the square for the (x²-3²) term as,
![2(x+ k)(x - k)(x +9)=2( x+9) (x+3)(x-3)\\2(x+ k)(x - k)(x +9)=2 (x+3)(x-3)( x+9)](https://tex.z-dn.net/?f=2%28x%2B%20k%29%28x%20-%20k%29%28x%20%2B9%29%3D2%28%20x%2B9%29%20%28x%2B3%29%28x-3%29%5C%5C2%28x%2B%20k%29%28x%20-%20k%29%28x%20%2B9%29%3D2%20%28x%2B3%29%28x-3%29%28%20x%2B9%29)
On comparing the two equation, we get the value of k as 3. Thus, the value of the constant 'k' in the factored form factorization the provided polynomial equation is 3.
Learn more about factor of polynomial here;
brainly.com/question/24380382