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polet [3.4K]
3 years ago
15

Solve the equation by completing the square

Mathematics
1 answer:
Ilya [14]3 years ago
4 0

Answer:

We got the quadratic equation:

x^2+8x-3=0

Solving by completing the square:

x^2+8x-3=0\\x^2+8x+16-16-3=0\\(x+4)^2-16-3=0\\(x+4)^2-19=0\\(x+4)^2=19\\x+4=\pm \sqrt{19} \\x=-4\pm \sqrt{19} \\\\x_{1} =-4+\sqrt{19} \\x_{2} =-4-\sqrt{19}

Therefore, the answer is letter C

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Pls help to get the answer
soldier1979 [14.2K]
When they say quotient, they want a fraction, so the answer for that would be
\frac{6}{10}
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3 0
3 years ago
Make y the subject to the following questions
skelet666 [1.2K]
In this question it basically wants you to leave Y alone in a side of the equation.

In this case,
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y=\frac{c}{3}

For Ay=w

y=\frac{w}{A}

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Y=cw

For y/a=2c
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For a=y+p
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5 0
3 years ago
Find the average rate of change of the function over the given intervals. f(x) = 12x3 + 12; [5,7]
AlladinOne [14]
<span>average rate of change = (f(7) - f(5)) / (x7 - x5)
</span>f(7) = <span>12 (7^3) + 12 = 4128
f(5) = </span>12 (5^3) + 12 = 1512

so
average rate of change = (4128 - 1512)/(7-5)
average rate of change = 2616 / 2
average rate of change = 1308

hope it helps
7 0
3 years ago
If two angles are supplementary and one angle is 84°, what is the measure of the other angle?
vekshin1
96 degrees is your answer

supplementary means the angles add up to be 180 degrees. if 1 angle is 84 degrees then 180-84=96
7 0
3 years ago
Look at this graph:
Lorico [155]
Y = 30/20x + 20
( i haven’t done this in a while but i’m pretty sure this is right)
4 0
3 years ago
Read 2 more answers
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