Evaluate the expression for the given values. 4ab/8c , where a = 8, b = 4, and c = 1/2 Enter your answer in the box.
2 answers:
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Answer:
Option (E)
Step-by-step explanation:
Expression given in the attachment,
By multiplying with x on both the sides of the given equation,
x² - 15 = 2x
x² - 2x - 15 = 0
x² - 5x + 3x - 15 = 0
x(x - 5) + 3(x - 5) = 0
(x + 3)(x - 5) = 0
(x + 3) = 0
x = -3
And (x - 5) = 0
x = 5
Therefore, x = -3, 5 are the solutions of the given equation.
Option (E) will be the answer.
Answer:
3rd. row becomes [0 0 -6 1]
Step-by-step explanation:
The element of pivot is the 9 in the 2nd row, so the 1st and 2nd rows stays the same.
For the 3rd row we have to calculate in each column, the element of the 3rd row minus the element of the 2nd row, and put it in the 3rd row.
This way we have <em>four operations</em> as follow:
for columns 1 to 4 in that order.
With this procedure, the system becomes
[1 –2 3 1]
[0 9 2 –5]
[0 0 –6 1]