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pashok25 [27]
3 years ago
14

What is the solution to 2х2+8х=х2-16?

Mathematics
2 answers:
Alex787 [66]3 years ago
7 0
The answer should be x=-4
Yakvenalex [24]3 years ago
4 0

Answer:

double, real root x = -4

Step-by-step explanation:

Please use " ^ " to indicate exponentation:  2х^2 + 8х = х^2 - 16.

Combine like terms:

х^2 + 8х = - 16.

Re-write in the standard form for a quadratic:

х^2 + 8х + 16 = 0

Recognize that this is the square of the binomial x + 4:

х^2 + 8х + 16 = 0  =>  (x + 4)^2 = 0

Solving this last result for x yields the double, real root x = -4.

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Two equations are given below:
goldenfox [79]
Since the second equation gives a value for a, we can substitute it into the other equation to find a value for B.

Let's substitute b-2 into the first equation wherever there is an a.

a - 3b = 4
(b-2) - 3b = 4
b - 2 - 3b = 4
-2 - 2b = 4
-2b = 6
b = -3

Now let's find a by substituting -3 into either of the equations to find the value of a.

a = b - 2
a = -3 - 2
a = -5

So your solution set  is (-5, -3)
4 0
3 years ago
Two cards are drawn from a deck of 52 playing cards. The first card is replaced into the deck before the 2nd card is drawn. What
Firlakuza [10]

Answer:

1/676

Step-by-step explanation:

There are 52 cards

P(Ace of spades) = Number of aces of spades / total = 1/ 52

The replace the card

There are 52 cards

There are 4 kings

P(king) = number of kings / total = 4/52 = 1/13

P( ace of spades , replace, any king) = 1/52 * 1/13 = 1 /676

5 0
3 years ago
Determine whether the given value is a solution of the equation.
nlexa [21]

Answer:

16 is not the solution to the equation

Step-by-step explanation:

5 0
3 years ago
Can anyone help me please ​
Vikki [24]

Answer:

i think it is x= -4/3

Step-by-step explanation:

maybe

7 0
3 years ago
Read 2 more answers
2, -6, 18, __, 162, __, ...​
Semmy [17]

Answer:

-54, 162, -486

Step-by-step explanation:

You multiply the number in front by -3.

2*-3=-6

-6*-3=18

18*-3=-54

-54*-3=162

162*-3=-486

-Please mark as brainliest!-

-Hope this helps!-

-Good Luck!-

7 0
3 years ago
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