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-BARSIC- [3]
3 years ago
13

(x+3)(2x-1) whats the product im sooo confused

Mathematics
2 answers:
Elodia [21]3 years ago
8 0

Answer: 2x

​2

​​ +5x−3

Step-by-step explanation:

2x

​2

​​ −x+6x−3

2x

​2

​​ +(−x+6x)−3

trapecia [35]3 years ago
4 0

Answer:

2 {x}^{2}  + 5x - 3

Step-by-step explanation:

1) multiply the the parentheses

2) calculate the products

3)collect like terms

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How to solve<br><br> 3sin^2x= cos^2x
DochEvi [55]

I'll try it.
I just went through this twice on scratch paper.  The first time was to
see if I could do it, and the second time was because the first result
I got was ridiculous.  But I think I got it.

You said                                                 <span><u>3sin²(x) = cos²(x)</u>

Use this trig identity:  sin²(x) = 1 - cos²(x)   

                                   Plug it into the original equation for (x).

                                                     3(1 - cos²(x) )  =  cos²(x)

Remove parentheses on the left:    3 - 3cos²(x)  =  cos²(x)

Add  3cos²(x)  to each side:            3                  =  4cos²(x)

Divide each side by  4 :                  3/4  =  cos²(x)

Take the square root of each side:    <em>cos(x) = (√3) / 2</em> .

There it is ... the cosine of the unknown angle.
Now you just go look it up in a book with a table cosines,
or else pinch it through your computer or your calculator,
or else just remember that you've learned that

                           cos( <em><u>30°</u></em> )  =  </span><span><span>(√3) / 2 </span>.


</span>
7 0
3 years ago
Which statement is true about the patterns in the two tables ?
MAXImum [283]

Answer: The fourth one

Step-by-step explanation:

7 0
3 years ago
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A circle has a diameter of 8m. What is its circumference?
Maslowich
The answer should be 25.12
6 0
3 years ago
Please help with number 9
RUDIKE [14]
This is the answer i got 147
6 0
3 years ago
Solve the equation by completing the square. round to the nearest hundredth if necessary. x^2-6x=20
amm1812
X^2 - 6x = 20
x^2 - 6x + 9 = 20 + 9
(x - 3)^2 = 29
x - 3 = (+-) sqrt 29
x = 3 (+-) sqrt 29
x = 3 (+-) 5.39

x = 3 + 5.39 = 8.39 <=
x = 3 - 5.39 = - 2.39 <=
6 0
3 years ago
Read 2 more answers
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