Answer:
x-8 to get the zero for the 8 you have to add it. And for the second part you have to subtract four from itself.
Step-by-step explanation:
From the expression (x - 8) (x + 4), the values of x need to be 8 or -4, for x to be equal to zero.
Given that:
(x - 8) (x + 4) = 0
The expression from above is the expanded form of a given quadratic equation.
To find the quadratic equation, we will use the values of one enclosed bracket to multiply the values of the other.
i.e.
(x -8) (x + 4) = 0
x² + 4x - 8x - 32 = 0
x² - 4x - 32 = 0
From the roots;
(x - 8) (x + 4) = 0
Let;
(x - 8) = 0 or (x +4) = 0
x - 8 = 0 or x + 4 = 0
x = 8 or x = -4
Therefore, we can conclude that the value of x needs to be 8 or -4 for x to be equal to zero.
Learn more about quadratic equations here:
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