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3 years ago

Don’t understand this question

Mathematics

1 answer:

AleksandrR [38]3 years ago

3 0

I believe it would be A D E
not positive but pretty sure

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Which are the solutions to the quadratic equation x^2=9x+6

AlekseyPX

I will use a quadratic formula:

$x^2=9x+6\ \ \ \ |-9x-6\\\\x^2-9x-6=0\\\\a=1;\ b=-9;\ c=-6\\\\b^2-4ac=(-9)^2-4\cdot1\cdot(-6)=81+24=105\\\\\sqrt{b^2-4ac}=\sqrt{105}\\\\x_1=\dfrac{-b-\sqrt{b^2-4ac}}{2a};\ x_2=\dfrac{-b+\sqrt{b^2-4ac}}{2a}\\\\x_1=\dfrac{-(-9)-\sqrt{105}}{2\cdot1}=\dfrac{9-\sqrt{105}}{2}\\\\x_2=\dfrac{-(-9)+\sqrt{105}}{2\cdot1}=\dfrac{9+\sqrt{105}}{2}$

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3 years ago

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Klio2033 [76]

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Step-by-step explanation:

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Anvisha [2.4K]

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Step-by-step explanation:

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4 years ago

The following table shows the expressions that represent the sales of two companies:

nikdorinn [45]

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3 years ago

Read 2 more answers

a square has a perimeter of 48cm.the square is cut in half . the two halves are put together to make this shape . what is the pe

Naily [24]

Answer:

The length of each side is 12cm.

Explanation:

The perimeter of a square is calculated by the formula:

P=4a, where P=perimeter, and a=length of any side, all sides being equal in a square.

From the given data we write:

48=4a

Divide both sides by 4.

12=a

The length of each side is 12cm.

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3 years ago