The expression (x+j)(x-j)(x-k) can be rewritten as x^3-5x^2-4x+t, where j, k, and t are constants. which of the following is the value of t: 20, 10, -10, -20

The correct option is:  20

Explanation

The expression can be rewritten as

That means:  

Now simplifying the left side, we will get....

Now comparing the co-effcients of like terms in left and right side, we will get.....

Thus, the value of 't' will be 20.