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
Ilya [14]
4 years ago
14

What is the answer to 2x^2 - 3x - 15 = 5

Mathematics
1 answer:
Alja [10]4 years ago
6 0
2x²-3x-15=5
2x²-3x-15-5=0
2x²-3x-20=0
½(2x+5)(2x-8)

-2x=-5
x=-5/2


2x-8=0
2x=8
x=4




---------------------------


You might be interested in
(x+3)^2=4
GalinKa [24]

Answer:

x = -1, -5

Step-by-step explanation:

{(x + 3)}^{2}  = 4 \\  =  >  {x}^{2}  + 2 \times x \times 3 +  {3}^{2}  = 4 \\  =  >  {x}^{2}  + 6x + 9 = 4 \\  =  >  {x}^{2}  + 6x = 4 - 9 \\  =  >  {x}^{2}  + 6x =  - 5 \\  =  >  {x}^{2}  + 6x  + 5 = 0 \\  =  >  {x}^{2}  + 5x + x + 5 = 0 \\  =  > x(x + 5) + 1(x + 5) = 0 \\  =  > (x + 1)(x + 5) \\  =  > x =  - 1 \:  \: or \:  \:  - 5

Hope it helps.

Don't forget to click the "Brainliest" button if you like my answer.

6 0
3 years ago
Read 2 more answers
Using the completing-the-square method, rewrite f(x) = x2 − 8x + 3 in vertex form.
lys-0071 [83]
          f(x) = x² - 8x + 3
             y = x² - 8x + 3
           - 3                - 3
        y - 3 = x² - 8x + 16
y - 3 + 16 = x² - 8x + 16
     y + 13 = x² - 8x + 16
     y + 13 = (x - 4)²
         - 13      - 13
             y = (x - 4)² - 13
          f(x) = (x - 4)² - 13
8 0
3 years ago
What is the slope of the coordinates (8,1) and (5,-2)
gulaghasi [49]

Answer:

I know this isn't the answer you'd like, but there's a graphing app called ''desmos'' and you can enter the equation in there and it gives you your answer.

Step-by-step explanation:

3 0
3 years ago
Please help brainlist!
insens350 [35]

Answer:

4/8 - 2/8 = 2/8 = 1/4

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Given that ∠A≅∠B, Gavin conjectured that ∠A and ∠B are complementary angles.
Rama09 [41]
45 and 45 because they are equal and add up to 90 degrees
4 0
3 years ago
Other questions:
  • URGENT!!! anyone know this? 10 POINTS!!
    12·2 answers
  • Question 6 of 30 Kristen wrote a number that is equal to three times the difference of 65 and 48. Which expression represents th
    11·1 answer
  • Subtract: (x^2 - 8x + 5)-(-3x^2 + 5x-9)
    14·1 answer
  • True or false, rotational symmetry is the quality a design has if it maintains all characteristics when it is rotated about a po
    9·2 answers
  • Substitute for y and rewrite the system of equations as a single equation which can be used to solve for x.
    9·1 answer
  • Write the decimal equivalent of the following: seven hundred seventy-five thousandths?
    14·1 answer
  • PLS HELPPPP
    8·2 answers
  • 10
    11·1 answer
  • What type of property is this: -8x=20
    15·2 answers
  • Use elimination to solve the system. The solution is ( , ). 3x+1/2y=3 6x-y=2
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!