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Oksanka [162]
4 years ago
10

How do you solve an equation by completing the square? Example:

D-8" id="TexFormula1" title=" x^{2}+6x=-8" alt=" x^{2}+6x=-8" align="absmiddle" class="latex-formula">
Mathematics
2 answers:
Serga [27]4 years ago
7 0
X²+6x+8=0
x²+2*3x+9-1=0
(x+3)²-1=0
(x+3)²-1²=0
(x+3-1)(x+3+1)=0
(x+2)(x+4)=0
x₁=-2
x₂=-4
Answer: x₁=-2,  x₂=-4
bixtya [17]4 years ago
7 0
x^2+6x=-8\\
x^2+6x+9=1\\
(x+3)^2=1\\
x+3=1 \vee x+3=-1\\
x=-2 \vee x=-4
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Solve the following factorize and the en- equation of quadrate equation X² + 5x + 7 x = 0​
nlexa [21]

Answer:

{-12,0}

Step-by-step explanation:

first to solve this can collect like terms and add

X² +12x=0

and solve it by factorization method

X² +12x=0

x(x+12)=0

it means x multiplied by x = X² then x multiplied by 12 = 12x

so this means x or (x+12) equals to zero

x=0 and (x+12)=0

x+12=0

x=-12

so the solution set is {-12,0}

but can also be done by formula method

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2 years ago
What is the height of the trapezoid if the Area = 26 un²?
Vladimir79 [104]

Answer:4

Step-by-step explanation:

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3 years ago
Suppose you deposit $6000 in a savings account that pays interest at an annual rate of 4% compounded continuously. In 8 years, w
Semenov [28]
Idk sorry for that ‍♀️‍♀️
7 0
3 years ago
Read 2 more answers
20) A company made $4500 in profit and reserved $90 for training staff. What percentage of the profit, does the company reserve
kotegsom [21]

Answer:

2%

Step-by-step explanation:

the amount reserved in % is ($90÷$4500)×100=2%

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7 0
3 years ago
A man buys 30 birds, which are sparrows, turtle-doves, and doves, for 30 dollars. Three sparrows cost 1 dollar, two turtle-doves
kap26 [50]

Answer: The two equations that represent the conditions in the problems are \dfrac{s}{3}+\dfrac{t}{2}+2d=30

s+t+d=30

Step-by-step explanation:

Since we have given that

Cost of 3 sparrows = $1

Cost of 2 turtle doves = $1

Cost of 1 dove = $2

Number of birds = 30

total cost = $30

So, Cost of s sparrows would be

\dfrac{1}{3}s

Cost of t turtle doves would be

\dfrac{1}{2}t

Cost of d doves would be

2t

According to question, it becomes,

\dfrac{s}{3}+\dfrac{t}{2}+2d=30

and

s+t+d=30

Hence, the two equations that represent the conditions in the problems are \dfrac{s}{3}+\dfrac{t}{2}+2d=30

s+t+d=30

8 0
3 years ago
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