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terrasami3152
28.09.2019 •
Mathematics
Solve.
-x/3 + 3 ≥ 4
a. x < -1/3
b. none of these
c. x ≤ -3
d. x ≤ -1/3
e. x ≥ -3
Solved
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Ответ:
Ответ:
x = -4 ± i4
Step-by-step explanation:
This is a quadratic equation with coefficients {1, 8, 32}. We apply the quadratic formula to solve for x. The first step is to find the 'discriminant,' b^2 - 4 ac, which here is (8)^2 - 4(1)(32), or 64 - 128, or -64.
A negative discriminant indicates that this quadratic has two unequal complex roots.
-b ± √(b^2 - 4ac)
The formula is x =
2a
which, when evaluated at a = 1, b = 8 and c= 32, yields
-8 ± √(-64)
The formula is x =
2(1)
or:
-8 ± i√64
The formula is x = = x = -4 ± i4
2