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tatyana61 [14]
3 years ago
6

Solve the quadratic equation x2+2x+3​

Mathematics
2 answers:
Anastaziya [24]3 years ago
8 0

Answer:

-2+ sqrt(8)i or -2-sqrt(8)i

Step-by-step explanation:

adelina 88 [10]3 years ago
3 0

Answer:

x=i\sqrt{2} -1, x=-i\sqrt{2}-1

Step-by-step explanation:

Hoping the equation is x^2+2x+3 = 0

Rewrite so I can complete the square:

x^2+2x=-3

Take the square of half of 2 and square.

x^2+2x+1=-2

(x+1)^2=-2

x + 1=\sqrt{-2}

x=i\sqrt{2} -1, x=-i\sqrt{2}-1

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Help!!
Elza [17]

Answer:

(b)\ 2x - 9 = -1

(c)\ -2x + 12 = 4

(e)\ 2(x - 10) = -12

Step-by-step explanation:

Required

Which equals x = 4

(a)\ 2x + 6 = 2

Collect like terms

2x  = 2 - 6

2x  = -4

Divide both sides by 2

x = -2

(b)\ 2x - 9 = -1

Collect like terms

2x = -1 + 9

2x = 8

Divide both sides by 2

x = 4

(c)\ -2x + 12 = 4

Collect like terms

-2x =- 12 + 4

-2x =-8

Divide both sides by -2

x = 4

(d)\ 2(x + 2) = 10

Divide both sides by 2

x + 2 =5

Collect like terms

x = 5-2

x = 3

(e)\ 2(x - 10) = -12

Divide both sides by 2

x - 10 = -6

Collect like terms

x = 10 - 6

x = 4

Hence, the equations with the required solution are:

(b)\ 2x - 9 = -1

(c)\ -2x + 12 = 4

(e)\ 2(x - 10) = -12

3 0
3 years ago
Customers of a phone company can choose between two service plans for long distance calls. The first plan has a $22 monthly fee
vladimir2022 [97]
Company a = 22 + 0.07m
company b = 8 + 0.12m

We are looking for the time when the prices are equal. i.e. the price of company a = the price of company b

company a = company b
22 + 0.07m = 8 + 0.12m
22 - 8 = 0.12m - 0.07m
14 = 0.05m
m = 14/0.05
m = 280

Therefore, the two companies will cost the same if you talk for 280 minutes
5 0
3 years ago
(3x + 1/2 ) + ( 7x - 4 1/2 ) simply the expression
ololo11 [35]

(3x + 1/2 ) + ( 7x - 4 1/2 )

3x+7x + 1/2 - 4 1/2

10x -4

5 0
3 years ago
Helpppppoppp meeeeeee
madreJ [45]

Answer:

9 feet

Step-by-step explanation:


8 0
3 years ago
Read 2 more answers
What is the remainder in the division problem modeled below
kati45 [8]
It looks like it may be 15 divided by 2.
8 0
3 years ago
Read 2 more answers
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