Find a cubic polynomial in standard form with real coefficients, having the given zeros -3 and 6 + 2i
1 answer:
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The answer to the first:
x>9 ⇒ x∈(9,+∞)
the graph shows that the x is bigger that 9 but IT CAN'T BE 9, we can tell that because the inner of the dot is white (if the inner of the dot was black too it would meant that the x would be bigger that 9 but it could be 9 as well).
I also inserted a picture which shows what I'm talking you about (just ignore the greek on the top).
the answer to the second:
4(3x)+7-5x-5+3y-y=
= 12x+7-5x-5+3y-y
=7x-2y+2
x>9 ⇒ x∈(9,+∞)
the graph shows that the x is bigger that 9 but IT CAN'T BE 9, we can tell that because the inner of the dot is white (if the inner of the dot was black too it would meant that the x would be bigger that 9 but it could be 9 as well).
I also inserted a picture which shows what I'm talking you about (just ignore the greek on the top).
the answer to the second:
4(3x)+7-5x-5+3y-y=
= 12x+7-5x-5+3y-y
=7x-2y+2
Answer
a. The volume is multiplied by 4
b. The volume is doubled
Explanation
a. The volume of a cone with radius r and height h is . If the radius is doubled, the new volume will be
, which is equal to
. This means that the volume is multiplied by 4.
b. The volume of a cone with radius r and height h is . If the height is doubled, the new volume will be
, which is equal to
. This means that the volume is multiplied by 2.