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
denpristay [2]
3 years ago
14

Factor the expression 15x-^2-10x-5

Mathematics
2 answers:
Hoochie [10]3 years ago
8 0
15x^2-10x-5=0\\ \\ a=15, \ \ b=-10 \ \ c=-5\\ \\ \Delta = b^{2}-4ac = (-10)^{2}-4* 15* (-5)= 100+300=400\\ \\x_{1}=\frac{-b-\sqrt{\Delta }}{2a} =\frac{10- \sqrt{400}}{2*15}=\frac{10-20}{30}= \frac{-10}{30}=-\frac{1}{3}\\ \\x_{2}=\frac{-b+\sqrt{\Delta }}{2a} =\frac{10+ \sqrt{400}}{2*15}=\frac{10+20}{30}= \frac{30}{30}=1 \\ \\ \ 15x^2-10x-5=15(x+ \frac{1}{3})(x-1)=  (15x+ \frac{1}{3}*15)(x-1)=(15x+5)(x-1)\\ \\ Answer :15x^2-10x-5 =(15x+5)(x-1)
slava [35]3 years ago
6 0
15x^2 - 10x - 5
(3x + 1) (5x - 5)

If it tells you to solve it, set each part in parentheses and solve. What you end up will be your 2 final answers.
You might be interested in
What is the value of x
WITCHER [35]

Answer:

x =68

Step-by-step explanation:

The sum of the angles of a triangle are 180

37+75+x = 180

Combine like terms

112+x = 180

Subtract 112 from each side

112+x-112=180-112

x =68

6 0
2 years ago
Help me please.........​
Shalnov [3]

Answer:

um 21

Step-by-step explanation:

4 0
2 years ago
1234567890987654321qwertyuiooplkjhgfdsazxcvbnnm
Lera25 [3.4K]

Answer:

i felt that

Step-by-step explanation:

but anyways stream Peeweee

6 0
2 years ago
Select the two values of x that are roots of this equation.
makkiz [27]

Answer:

\implies x = (-2) \qquad or\qquad x = \dfrac{-3}{2}

Step-by-step explanation:

<u>Given </u><u>:</u><u>-</u><u> </u>

  • A quadratic equation is given to us.
  • The equation is 2x² + 7x +6=0

And we need to find out the roots of the given equation. We can use the middle term splitting method to find out the roots as ,

<u>Given </u><u>equation</u><u> </u><u>:</u><u>-</u>

\implies 2x^2 + 7x +6=0

Step 1: <u>Find</u><u> out</u><u> the</u><u> </u><u>factors</u><u> </u><u>of </u><u>1</u><u>2</u><u> </u><u>:</u><u>-</u><u> </u>

We will choose the two factors such that their sum equals to the coefficient of x i.e. 7 .The factors are , 1×12 , 2×6 , 3×4 .

  • And 3 + 4 = 7. So we will break the middle term into 3x and 4x .

Step 2 :<u> Breaking</u><u> the</u><u> </u><u>middle</u><u> term</u><u> </u><u>:</u><u>-</u><u> </u>

\implies 2x^2 + 3x+4x +6=0

Step 3: <u>Take </u><u>out </u><u>common</u><u> </u><u>from </u><u>terms </u><u>:</u><u>-</u>

\implies x(2x + 3) +2(2x +3)=0

\implies ( x +2)(2x+3)=0

Step 4 : <u>Equate </u><u>them </u><u>with </u><u>0</u><u> </u><u>:</u><u>-</u><u> </u>

\implies x = (-2) \qquad or\qquad x = \dfrac{-3}{2}

<u>Hence </u><u>the</u><u> </u><u>correct</u><u> </u><u>options </u><u>are </u><u>C </u><u>and </u><u>D </u><u>.</u>

5 0
2 years ago
Please help me!
svlad2 [7]

T(m) = 0.25m

Hope this helps! ;)

5 0
3 years ago
Other questions:
  • One number is 3 times more than another number. Their sum is 20. What are the two numbers?
    10·2 answers
  • Need math help please
    6·1 answer
  • Identify the dependent variable in the situation. Coat sales go up when it is cold outside.
    14·1 answer
  • Please HELP!!! What is the justification for the step taken from line 2 to line 3?
    14·2 answers
  • Solve the following system of equations via elimination.<br> 12x – 9y = 30<br> 6x+15y=54
    15·1 answer
  • Juan reads a book with 368 pages. savannah reads a book with 172 fewer pages than juan's book. how many pages are in the book sa
    12·2 answers
  • Can someone help me with this :(
    10·2 answers
  • Factor the expression using the GCF 18p + 26
    8·2 answers
  • Fish are sold at 10 for $8.64. What will be the cost of 16 fish
    10·1 answer
  • Please help!! Which figures demonstrate a single translation?<br><br> Select each correct answer.
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!