Question

X (x-4) = 140
solve for x.

Answer 1

14 and 10

Explanation:

We have the equation x(x-4)=140. We can distribute the x to everything in the parenthesis so it's easier to work with.

x(x-4)=140

`x^2-4x=140`

Let's move 140 to the left side, so we can solve this equation better by finding the zeros of the equation.

`x^2-4x-140=0`

To find the zero, we have to find TWO values that multiply to -140 but add to -4.

(x-14)(x-10)=0

To find the zeros. make both of those parenthesis equal to zero.

x=14, 10