honeysenpai6
27.08.2019 •
Mathematics
What is the factored form of x2 – 6x – 16? (x – 4)(x – 2) (x 4)(x – 2) (x – 2)(x 8) (x – 8)(x 2)
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Ответ:
Option D is correct
factored form of the given equation is; (x+2)(x-8)
Explanation:
The given quadratic equation is :
Now, to convert this quadratic equation into factored form;
So, r and s must satisfy:
r+s=b
rs =c
Now, we are looking for a pair of numbers whose product is -16 such as (4,−4), (1, -16), (2, -8). They also have to add up to -6.
The only choice that satisfies both is (2 , -8).
then;
=
or
=
Now taking (x-8) common we get;
=
therefore, the factored form of the is;
Ответ:
x²-6x-16=x²+2x-8x-16=x(x+2)-8(x+2)=(x+2)(x-8)
Answer D.
Ответ: