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Radda [10]
3 years ago
13

Which expression is equivalent to 4x2 + 9x – (x – 3)2 + 11?

Mathematics
1 answer:
Zanzabum3 years ago
4 0
4x^2+9x-(x^2-6x+9)+11
4x^2+9x-x^2+6x-9+11
3x^2+15x+2
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Which of the following is a solution of x2 + 2x + 8?
zubka84 [21]
Using the quadratic equation we get:
\frac{ - 2 + - \sqrt{4 - 32} }{2} = \frac{ - 2 + - \sqrt{ - 28} }{2}

Factoring out 2 we get
\frac{ - 2 + - 2\sqrt{ - 7} }{2} = - 1( + - ) \sqrt{ - 7}
Factoring out the imaginary number:
- 1 + \sqrt{7} i \: (and) \: - 1 - \sqrt{7} i
So b.
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3 years ago
The cost of making a cheese cake is RM45. In
mars1129 [50]

Answer:

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Step-by-step explanation:

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3 years ago
4 - (-18) = 4 - (-18) =
VashaNatasha [74]

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8 0
3 years ago
Please Answer ASAP, Thx! 5x -2y=17 and 4x - 3y= 8
iVinArrow [24]

5x - 2y = 17

4x - 3y = 8

Try to change one of the equations to isolate a variable, so you can use the new equation and substitute it into the other equation.

5x - 2y = 17

-2y = 17 - 5x

y = -17/2 + 5/2x

Now plug this into the second equation

4x - 3(-17/2 + 5/2x) = 8

4x + 51/2 - 15/2x = 8

8/2x - 15/2x = 16/2 - 51/2

-7/2x = -35/2

x = 5

Plug this into either equation to find y

4x - 3y = 8

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20 - 3y = 8

-3y = -12

y = 4


x = 5, y = 4

5 0
3 years ago
What are the answers to this ? HELP ASAP PLS, this is timed ! Please explain as well !
DochEvi [55]

Answer:

b is the answer

Step-by-step explanation:

did I help you

5 0
2 years ago
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