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
Mashcka [7]
3 years ago
15

The quadratic equation 2x^2+4x-30=0 has two solutions. one of the solutions is x=3 the other solution is?

Mathematics
2 answers:
BartSMP [9]3 years ago
6 0

Answer:

2x^2+4x-30=0

Step-by-step explanation:

2x^2+10x-6x-30=0

2x(x+5)-6(x+5)=0

(2x-6)(x+5)=0

2x-6=0        x+5=0

x=6/2          x=-5

x=3

Irina18 [472]3 years ago
5 0

Answer:

Step-by-step explanation:

2x^2+4x-30=0\\ x^2+2x-15=0

so we know that the sum of the two solutions is -2 and the multiplication -15

so we are looking for x so that

x+3=-2 and 3x=-15

it gives x = -5

another way to do it is to put (x-3) in factor as we know that 3 is one of the solutions it gives

2x^2+4x-30 = 2(x-3)(x+5)

and then the second solution is -5

You might be interested in
Compare these integers by typing the symbol that will make the answer correct -6 ____ 3
Mila [183]
3 is greater than -6. Therefore, 

-6 < 3.
8 0
3 years ago
Read 2 more answers
Consider these statements.
igomit [66]

Answer:

B

Step-by-step explanation:

if we match the two informations we can say that the triangle is isosceles

5 0
3 years ago
Help me with this quick!
lara [203]

6g+10≤35

Hope that helps!!! :D

3 0
3 years ago
At which step did Fatu make an error, if at all?
Elza [17]

Answer:

Step 3

Step-by-step explanation:

7 0
3 years ago
The number of students in a math club decreased from 15 to 11. What is the percent decrease? Round to the nearest percent.
Alinara [238K]

Answer:

27%

Step-by-step explanation:

Decrease= 15-11

=4

Percentage=4÷15

=0.266666667

=26.667%

~27%

4 0
3 years ago
Other questions:
  • EASY 4 MOST PLZ HELP IM GONNA FAIL!!!!!(my grade is dropin) oof
    14·2 answers
  • What is the absolute value of 5.23
    10·1 answer
  • X-14&lt;-6x+7≤13 solve for x
    6·1 answer
  • Apply each of the four counting/sampling methods (with replacement and with ordering, without replacement and with ordering, wit
    10·1 answer
  • What are the fraction of the shape shaded on these three shapes?
    11·1 answer
  • Heeeeeeelp please ;-;
    13·1 answer
  • Disebuah perpustakaan, buku-buku disusun rapi didalam lemari dengan membentuk deret aritmatika. Pada sebuah lemari terdapat 6 su
    5·1 answer
  • What is the slope of the line that passes through the points (−4,−3) and (14,0)?
    12·1 answer
  • Giving brainlist for correct
    12·2 answers
  • The bar diagram represents 24 hours in one day and shows a mark at 30%.
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!