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omeli [17]
3 years ago
15

ASAP HELP PLEASE GIVING BRAINLIEST! Please read the question THEN answer correctly! No guessing!!

Mathematics
1 answer:
Marta_Voda [28]3 years ago
4 0

Answer:

C x =  (-5+sqrt(-3))/2

D x = ( -5-sqrt(-3))/2

Step-by-step explanation:

Set the polynomial equal to zero

x^2 + 5x+7 =0

Subtract 7 from each side

x^2 + 5x+7-7 =-7

x^2 + 5x = -7

Complete the square by taking the coefficient of x and dividing by 2 and then squaring it

(5/2)^2 = 25/4

x^2 + 5x + 25/4 = -7+25/4

(x+5/2)^2 = -28/4 +25/4

(x+5/2)^2 = -3/4

Take the square root of each side

x+5/2 = ±sqrt(-3/4)

Subtract 5/2 from each side

x+5/2 -5/2 = -5/2±sqrt(-3/4)

x =  -5/2±sqrt(-3/4)

x =  -5/2±sqrt(-3)/2

x =  (-5±sqrt(-3))/2

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3 years ago
Factor completely 3x2 − x − 4.
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3 0
3 years ago
A total of 486 tickets were sold for the school play. They were either adult tickets or student tickets. There were 64 fewer sru
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Answer:

Step-by-step explanation:

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6 0
4 years ago
Please help ill give brainliest pls dont guess
LiRa [457]
When y=2 and y=5

1. 2y-1 and (3y-5+y or 4y-5)
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----nonequivalent-----

2.5y+4 and (7y+4-2y or 5y+4)
so you don't have to place any value in because 5y+4 and 7y+4-2y are equal,
whatever you place any value in, it will be all the same then

-----equivalent------

and no need to find more
7 0
3 years ago
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Answer:

Step-by-step explanation:

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