1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
REY [17]
3 years ago
10

How do I solve this equation by using the quadratic formula 3x^2-12x-27=-6

Mathematics
2 answers:
Oksi-84 [34.3K]3 years ago
7 0

Step-by-step explanation:

The quadratic equation is

x=−b=−√b2−4ac2a

for a quadratic taking the form

ax2+bx+c=0

So for this equation it is

x=−(−12)±√(−12)2−4⋅3⋅112⋅3

x=12±√144−1326

x=12±√4⋅36

x=6±√33

Natali [406]3 years ago
3 0

Answer:

Move all terms to the left side of the equation and simplify.

3x²−12x−21=0

Use the quadratic formula to find the solutions.

(−b±√b²−4(ac))/2a

Substitute the values a=3, b=−12, and c=−21 into the quadratic formula and solve for x.

(12±√(−12)²−4⋅(3⋅−21)0/2⋅3 Simplify =>  x=2±√11

The result can be shown in multiple forms.

Exact Form: x=2±√11

Decimal Form: x=5.31662479…,−1.31662479…

Step-by-step explanation:

You might be interested in
Does any1 know de wae? i need to know wat de wae is
Natalija [7]
I kno de wae brodah. Da wae is da qween
5 0
3 years ago
Read 2 more answers
Kumar has twice the number of goals as Jacob. Make an algebraic expression. Plzzzz help
alekssr [168]

The algebraic expression is x = 2y where, "x" is the number of goals with Kumar and "y" is the number of goals with Jacob

<em><u>Solution:</u></em>

Given that Kumar has twice the number of goals as Jacob

To find: algebraic expression

An algebraic expression is a mathematical expression that consists of variables, numbers and operations

<em><u>Let us first define the variables</u></em>

Let "x" be the number of goals with Kumar

Let "y" be the number of goals with Jacob

Then from given statement,

Number of goals with kumar = twice the number of goals as Jacob

Number of goals with kumar = 2(number of goals with Jacob)

x = 2y

Thus the algebraic expression is found

3 0
3 years ago
Please help please really need help please
just olya [345]

Answer:

x = 1

y = -2

Step-by-step explanation:

5x - 2y = 9 -----------(I)

2x + 7y = -12 --------------(II)

Multiply (I) by 7          35x - 14y = 63

Multiply (II) by 2         <u>4x + 14y  = - 24</u><u>  </u> {Now add and thus y will be eliminated}

                                  39x         =      39

                                          x = 39/39

x = 1

Plugin x = 1 in equation(I)

5*1 - 2y = 9

5 -2y = 9

    -2y = 9 -5

    -2y = 4

        y = 4/-2

        y = -2

8 0
3 years ago
What is the measure of ABC in the figure below
Ksivusya [100]

Answer:

Figure?

Step-by-step explanation:

3 0
4 years ago
Read 2 more answers
What is the function rule for the line
Sindrei [870]
It’s b. Because the number with out the x is the y-interact which is -2 then to find the other number I look at the graph and find another point and then count the rise/run which is rising 2 running 3 and it’s also positive that’s why it’s b.
7 0
3 years ago
Other questions:
  • Point F is on circle C.
    14·2 answers
  • Find the dimensions of the rectangle<br><br> A. 5x8<br> B. 2x6<br> C. 3x6<br> D. 2x3
    13·1 answer
  • What is the quotient of 234 and 9?
    6·1 answer
  • The 22 students and the teacher in a class participated in a community service project providing backpacks to needy families. Ea
    13·2 answers
  • A restaurant buys a freezer on the shape of a of a rectangular prism.the dimensions of the freezer are shown. What is the volume
    5·1 answer
  • Write a recursive formula for the sequence -2,4,-8, 16, ...
    12·1 answer
  • Express 16 1/3 in the simplest radical form
    13·1 answer
  • Chad bought a shirt for $19 and a pair of shoes for $28 more than the shirt how much was the pair of shoes
    8·1 answer
  • Melanie had two $10 bills, one $5 bill, four dimes, and six pennies. Then she bought a fruit cup for $2.19. How much money did M
    10·1 answer
  • (it urgent)<br> Find the AREA of the SHADED REGION
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!