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stellarik [79]
3 years ago
11

3x^2-12x-21=0 solve by completing the square

Mathematics
1 answer:
morpeh [17]3 years ago
3 0

Answer:

x = 2 ± √11 (I believe)

Step-by-step explanation:

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Aboslute value|10 blocks| + |3 blocks| + |-8 blocks| + |2 blocks| + |-7 blocks| + |4 blocks| + |-4 blocks| = ?
Elza [17]
Absolute or modulus always gives a positive number.
For example, when I take absolute value of 4, I get
|4| = 4 and when I take absolute value of -4, I get |-4| = -(-4) = 4.

Therefore, no matter what the sign of quantity is, absolute or modulus will always make it positive. 
Therefore,
<span>|10 blocks| + |3 blocks| + |-8 blocks| + |2 blocks| + |-7 blocks| + |4 blocks| + |-4 blocks| = 10 + 3 -(-8) + 2 -(-7) + 4 -(-4) = 10+3+8+2+7+4+4 = 38</span>
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3 years ago
How do you write 6.37 in scientific notation?
Leto [7]

Answer:

6.37 x 10^0

Step-by-step explanation:

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3 years ago
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inn [45]
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3 0
3 years ago
I don’t get the second question.
Bess [88]
<h2>Good morning,</h2>

<em><u>Answer</u></em>:

The quadratic equation is :  x²+x+1=0

<u><em>Step-by-step explanation:</em></u>

Generally:

let S be the sum of the roots z₁ and z₂

and P be the product of the roots z₁ and z₂

then z₁ and z₂ are the solutions for the equation:  x² − Sx + P = 0

Now,

S=-1 and P=1 then the equation is x²+x+1=0.

______

:)

8 0
3 years ago
A chairman is to be randomly selected from six people: A, B, C, D, E, and F. Find the probability that B is not selected.
Alborosie
5/6
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