3 years ago

What's the answer and how do you know?!!

Mathematics

1 answer:

S_A_V [24]3 years ago

7 0

C because its going back every time

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Anyone know how to find the length of x using the 30,60,90 method?

QveST [7]

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Answer:

2√5

Step-by-step explanation:

The side ratios in a 30-60-90 triangle are ...

1 : √3 : 2

The longest side (x) is 2 times the length of the shortest side (√5), so ...

x = 2√5

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Factor this trinomial completely.<br> 2x^2 + 10x + 8

Nikitich [7]

2x^2 + 10x + 8
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Alecsey [184]

Hi!

24 + 16 = 40

Answer: 40

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Step-by-step explanation:

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Which is one of the solutions to the equation 2x^2 - x - 4 = 0

Alex73 [517]

Answer:

$x_{1}=\frac{1+\sqrt{33} }{4}\\x_{2}=\frac{1-\sqrt{33} }{4}$

Step-by-step explanation:

Using quadratic formula

$x=\frac{-b+-\sqrt{b^{2}-4*a*c} }{2*a}$

we will have two solutions.

2x^2 - x - 4 = 0

So, a=2 b=-1 c=-4, we have:

$x_{1}=\frac{+1+\sqrt{-1^{2}-4*2*-4} }{2*2}\\\\x_{2}=\frac{+1-\sqrt{-1^{2}-4*2*-4} }{2*2}$

Finally, we have two solutions:

$x_{1}=\frac{1+\sqrt{33} }{4}\\\\x_{2}=\frac{1-\sqrt{33} }{4}$

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