(x-5)(x+6) / (x-3) less than or equal to 0
1 answer:
Answer:
Step-by-step explanation:
(x-5)(x+6) / (x-3) less than or equal to 0
multiply both sides by x-3
(x-5)(x+6) less than or equal to (x-3)
Foil
x^2 + 6x -5x -30 less than or equal to x-3
simplify
x^2 + x -30 less than or equal to x-3
Add 30 to both sides and subtract x from oth sides
x^2 less than or equal 27
take a square root of both sides
x less than or equal to
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Answer:
10
Step-by-step explanation:
The radius is the magnitude of the complex number that is the difference between any point on the circle and the center point. A suitable calculator can tell you that magnitude:
║(8+7i) - (2-i)║ = √((8-2)² +(7-(-1))²) = √(36+64) = √100 = 10
