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labwork [276]
3 years ago
9

Select the correct answer. What are the roots of this quartaic equation? -x^2+12x-9=0

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

Answer:

Step-by-step explanation:

x= 6±3\sqrt{3}

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-(2x+12) (9x^2+4x-9) <br><br><br>please show all work!
Bess [88]

Answer:

108 - 30x - 116x² - 18x³

Step-by-step explanation:

We have to get the value of - (2x + 12) (9x² + 4x - 9)

Now, using the distributive property of multiplication we get

- (2x + 12) (9x² + 4x - 9)

= -[2x (9x² + 4x - 9) + 12 (9x² + 4x - 9)]

= -[(18x³ + 8x² - 18x) + (108x² + 48x - 108)]

= -[18x³ + 116x² + 30x - 108]

= 108 - 30x - 116x² - 18x³ (Answer)

5 0
3 years ago
Paint sells in metal cans one gallon each. How many gallons of paint must be purchased to paint a room containing 840 square fee
Kisachek [45]

Answer:

5 Gallons of paint

Step-by-step explanation:

840 square ft one Gallons covers 190 square ft

6 0
3 years ago
What is y + 10 = -3(x + 10) in slope-intercept form?
g100num [7]
Y = -3x - 40. Use the distributive property to get the slope and move the 10 to the other side to isolate the y
7 0
3 years ago
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5/6k=-20 what is the correct answer ??
damaskus [11]
<span>5/6k=-20

k=-24

Hope this helps
</span>
4 0
3 years ago
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Multiply / Divide Radical Expressions<br> i need help please.
slava [35]

Answer:

2 with the sqaure root of 12 is = 6.9     simp =  6.9

4 with the sqaure root of 10 is = 12.6    simp= 12.6

sum = 19.5

I hoped this helped! :)

5 0
3 years ago
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