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
masya89 [10]
4 years ago
12

Help with solving for the variable in math problem: -3(3x)^2 + 3 = -6

Mathematics
2 answers:
liubo4ka [24]4 years ago
8 0

To solve this problem, we first need to do the exponents (PEMDAS).


(3x)² is equal to 9x² Now we can substitute this back.


-3(9x²) + 3 = -6


Now we do multiplication


-27x² + 3 = -6


Now we can subtract 3 from each side to get the x on one side.


-27x² = -9


We can now divide each side by -27.


x² = 1/3


x = \sqrt{\frac{1}{3}}


x = -\sqrt{\frac{1}{3}}

lana66690 [7]4 years ago
6 0

Answer

x = 1/√3  and   x = -1/√3 

or in decimals x = + 0.577350269  and 

                           = - 0.577350269


Explanation

-3(3x)² + 3 = -6

-3×9x² + 3 = -6

-27x² = -6-3

-27x² = -9


x² =-9/(-27)

    = 9/27


x = +√(9/27)   

 x = 3/√27

= 3/√9×3

= 3/3√3

= 1/√3

or in decimals x = 0.577350269

Also x = -√(9/27)

x = +√(9/27)   

 x = -3/√27

     = -3/√9×3

     = -3/3√3

    = -1/√3

or in decimals x = -0.577350269

You might be interested in
Bob can paint the lines in the middle of the road at a rate of 18 miles in nine hour workday how many miles can he paint on Satu
Citrus2011 [14]
First, you need how many miles in one hour. That means 18/9, which is two. So when Bob works five hours on Saturday, he would be able to paint 10 miles of lines.
4 0
3 years ago
Read 2 more answers
What two numbers have a sum of 17 and a difference of 3
anzhelika [568]
(7 & 10), bc 10-7=3 and 10+7=17
3 0
4 years ago
Add a construction job for a gallery, 105 painters were tasked with painting the interior. These painters made up 75% of the tot
nexus9112 [7]
Let P stand for the Paint crew...and you know that 75% of that crew = 105 people. So we know that...
P x .75 = 105
Divide both sides of the equation by .75 to solve for P...
P = 105/.75 = 140
So the total paint crew has 140 painters.
7 0
3 years ago
What is the value for k?<br><br> 1/2k + 6 = 4k - 8<br><br> a.) -4<br> b.) -3<br> c.) 3<br> d.) 4
inessss [21]
I hope this helps you

5 0
3 years ago
Read 2 more answers
Which method is best to use to solve the equation 4x2−29=0?(1 point)
makkiz [27]

Answer:

i think factoring

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Other questions:
  • If 120 million roses were sold on Valentine's Day, and 75% of the roses were red, how
    10·2 answers
  • Find the point estimate of the proportion of people who wear hearing aids, if in a random sample of 304 people, 20 people wear h
    6·2 answers
  • Consider the equation 0.2(x – 4.5) + 1.7 = 9.6.
    15·2 answers
  • 10 POINTS + BRAINLIEST ANSWER
    13·1 answer
  • There are 2/5 as many vans as cars and 2/3 as many vans as motorbikes in a parking lot. What is the ratio of the number of vans
    7·1 answer
  • What is the largest possible value of x given that <img src="https://tex.z-dn.net/?f=x%5E3%20%3D%205x" id="TexFormula1" title="x
    14·1 answer
  • NEED THE ANSWER PLS TIMER
    13·2 answers
  • Someone please help me I’ll give out brainliest please dont answer if you don’t know
    5·2 answers
  • Ranjit is going to the shop to pick up some groceries.
    7·1 answer
  • PLEASE HELP!!!!!<br> WILL MARK BRAINLIEST!!!!
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!