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
Sever21 [200]
3 years ago
6

What are the solutions of the quadratic equation? 4x^2+9x-9=0

Mathematics
2 answers:
Vilka [71]3 years ago
8 0

The solutions of the quadratic equation 4x²+9x-9 =0 is x= ³/₄ and x = -3

<h3>Further explanation</h3>

4x²+9x-9 =0

From the above equation a=4, b=9 and c = -9

We can solve the equation using this formula:

\boxed {x = \frac{-b \pm \sqrt{b^{2}-4ac } }{2a} }\\\boxed {x=\frac{-9 \pm\sqrt{81-(4 \times4 \times(-9))} }{8} }\\\boxed {x= \frac{-9 \pm\sqrt{225} }{8} } \\\boxed {x=\frac{-9+15}{8} =\frac{6}{8} =\frac{3}{4} }

and

\boxed {x= \frac{-9-15}{8} = \frac{-24}{8} = -3 }

so the solution is x = \frac{3}{4} or x = -3

<h3>Learn more</h3>

Quadratic equation brainly.com/question/2375877

Quadratic equation brainly.com/question/3843409

Keywords: quadratic equation, quadratic solutions

vagabundo [1.1K]3 years ago
5 0

Answer:

x=3/4

x=-3

Step-by-step explanation:

we have

4x^2+9x-9=0

we know that

The formula to solve a quadratic equation of the form ax^{2} +bx+c=0 is equal to

x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}

in this problem we have

4x^2+9x-9=0

so

a=4\\b=9\\c=-9

substitute in the formula

x=\frac{-9(+/-)\sqrt{9^{2}-4(4)(-9)}} {2(4)}

x=\frac{-9(+/-)\sqrt{225}} {8}

x=\frac{-9(+/-)15} {8}

x=\frac{-9+15} {8}=3/4

x=\frac{-9-15} {8}=-3

You might be interested in
When Javier and his father went to dinner, the bill was $34. If they tipped the waiter 20%, how much did they spend in total?
Kamila [148]

Answer:

Not sure if this is right, but I got $40.8.

Step-by-step explanation:

I first turned 20% into a decimal. (0.20).

Then I multiplied 0.20 and 34 which is 6.8.

I then added 34 since it’s the original cost to 6.8 since that’s the tip amount.

After that, you should get $40.8.

4 0
3 years ago
Read 2 more answers
5+ 3x - 37 = 6x + 23 - 8x what is the value for x
iris [78.8K]

Answer:

The value of X is 11

X=11

Step-by-step explanation:

Isolate the variable by dividing each side by the factors that don't contain the cariable.

4 0
2 years ago
BRAINLEST PLUS 10 PTS <br> Solve for x pls
Anna11 [10]

Answer:

x=39

Step-by-step explanation:

3 0
3 years ago
The width of a rectangle is 4x-4 feet and the length is 2x+5 feet. Find the perimeter
Ipatiy [6.2K]
Perimeter is
2 • width+ 2•length=
2• (4x-4)+2•(2x+5)=
Distribute multiplication in parentheses
8x-8+4x+10=
Combine like terms
12x+2
4 0
3 years ago
Evaluate -Z + 7.49 for Z = -7.1
luda_lava [24]
14.59

To solve, simply plug -7.1 into -Z. Since Z is negative in the equation, it will turn the Z that’s given to us into a negative. Since that Z is already negative, it will now become a positive since that’s what two negatives being multiplied make. This is what your problem will look like:

-(-7.1) + 7.49
7.1 + 7.49 = 14.59
3 0
3 years ago
Other questions:
  • Flying against the wind, an airplane travels 4000 kilometers in 5 hours. Flying with the wind, the same plane travels 5040 kilom
    5·1 answer
  • Using intercepts and the maximum, find an equation for the graph shown.
    11·2 answers
  • The Great Pyramid is an example of a
    5·2 answers
  • Does 27/60 -8/60=19/60?
    7·1 answer
  • How many degrees in the angle
    5·2 answers
  • Solve 8.88 = 4.44 (x - 7)
    7·2 answers
  • What’s the percent of 4.3% of 1200
    13·2 answers
  • If you have 3 cups of glue u use 2/3 cup of glue how much slime can u make?
    14·1 answer
  • ASAP pls help me with this question
    8·1 answer
  • Cellular phone service that charges per-minute will charge $15 for 70 minutes. How much would 1077 minutes cost?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!