Answer:
C
a = 1
b = -8
c = -9
Step-by-step explanation:
Change the equation into standard form.
x² - 8x -9 = 0
9 was transposed to the other side, hence the sign was changed.
Know that the standard form is ax + bx + c = 0, where a, b and c are coefficients.
In our equation, x² - 8x -9 = 0
the values will be ax = 1x², bx = -8x and c = 9
The question is only asking for the coefficients, which are a, b and c, so we will only take out the numerical coefficients.
1x² = 1
-8x = -8
-9 = -9
