Friday, August 7, 2015

Find the value of k if x^2 + kx - 6 = (x - 2)(x + 3).

Given the equation.


x^2 + kx
-6 = (x-2)(x+3)


We need to find the values of
k.


First we will simplify the right side by opening the
brackets.


==> x^2 + kx -6 = x^2 +3x -2x -
6


==> x^2 + kx -6 = x^2 + x -
6


Now we will add 6 to both
sides.


==> x^2 + kx = x^2 +
x


Now we will subtract x^2 from both
sides.


==> kx = x


Now
we will divide by x .


==> k = x/x =
1


==> Then the values of k =
1.

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