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3 years ago

What is the first step in solving x^2+2x+3=0

Mathematics

2 answers:

Westkost [7]3 years ago

7 0

First subtract three from both sides. then you have $x^{2}$ +2x=-3 and you solve from there

Neporo4naja [7]3 years ago

6 0

Is the question asking by completing the square?
X^2+2X+3=0
X^2+2x+1+2=0
(x+1)^2+2=0
(x+1)^2=-2
x+1=squr root 2i or x+1=-sqr root 2i

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Mike can build a go cart in 30 days, Jed can build one in 20 days and Erick in 60 days. If all of them share the work, how quick

Gwar [14]

Answer: 10 days

Step-by-step explanation:

Mike: $\frac{x}{30}$

Jed: $\frac{x}{20}$

Erick: $\frac{x}{60}$

Together: $\frac{x}{30}$ + $\frac{x}{20}$ + $\frac{x}{60}$ = 1

60 $(\frac{x}{30}$ + $\frac{x}{20}$ + $\frac{x}{60}$ = 1)

2x + 3x + x = 60

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x = 10

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3 years ago

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The product of twice a number and four. *

Crazy boy [7]

Answer: 20

Step-by-step explanation:

8 times 2 = 16

16 plus 4 = 20

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2 years ago

6a + 2b, 9a + 4b, 12 + 6b Find the 40th term Show all work :)

Naily [24]

1. 6a + 2b
2. 9a + 4b
3. 12a + 6b
4. 15a + 8b
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19. 60a + 38b
20. 63a + 40b
21. 66a + 42b
22. 69a + 44b
23. 71a + 46b
24. 74a + 48b
25. 77a + 50b
26. 80a + 52b
27. 83a + 54b
28. 86a + 56b
29. 89a + 58b
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Basically, add 3 to every number in front of the a and 2 to every number in front of the b. Or just multiply.

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3 years ago

What is x2 – 6 = 16x + 30 rewritten in standard form, then factored?

kaheart [24]

Answer:

Step-by-step explanation:

$x^2-6=16x+30\\\mathrm{Subtract\:}30\mathrm{\:from\:both\:sides}\\x^2-6-30=16x+30-30\\Simplify\\x^2-36=16x\\\mathrm{Subtract\:}16x\mathrm{\:from\:both\:sides}\\x^2-36-16x=16x-16x\\\Simplify\\x^2-16x-36=0$

5 0

3 years ago

Help I need answers

natali 33 [55]

We can easily work out the meter reading in October. It comes out to be 32347 + 972. So the reading in October must be around 33319.

SO the answer to second question is really easy to figure out too. As we know that one unit costs 14 p we can simply multiply the cost with the number of units consumed.

So for 972 units if we multiply by 14 we get the cost to be around somewhere 13608 p.

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3 years ago