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
77julia77 [94]
4 years ago
13

Factorize 2a^2+7a-15​

Mathematics
2 answers:
tresset_1 [31]4 years ago
8 0

Answer:

2a^2+10a-3a-15

2a(a+5)-3(a+5)

(2a-3) (a+5)

loris [4]4 years ago
5 0

\huge\bf  \pink {\underline{Solution :-}}

2 {a}^{2}  + 7a - 15

= 2 {a}^{2}  + 10a - 3a - 15

= 2a(a + 5) - 3(a + 5)

= (a + 5)(2a - 3)

\sf \red{Hence, Answer \:  is  \: (a + 5)(2a - 3).}

\\

\bf \purple{ \underline{ Important  \: Formulas  \: for  \: Factorization :-}}

• \:  {a}^{2}  + 2ab + {b}^{2} =  {(a + b)}^{2}

• \: (a + b)(a - b) =  {a}^{2}  -  {b}^{2}

• \:  {a}^{2} - 2 ab  +  {b}^{2}  =  {(a - b)}^{2}

• \:  {a}^{3}  + 3 {a}^{2} b + 3a {b}^{2}  +  {b}^{3} =  {(a + b)}^{3}

• \:  {a}^{3}   -  3 {a}^{2} b + 3a {b}^{2}   -  {b}^{3} =  {(a  - b)}^{3}

•  \:  {(a + b)}^{2}  +  {(a - b)}^{2}  = 2( {a}^{2}  +  {b}^{2} )

• \: {(a + b)}^{2}   -   {(a - b)}^{2}  = 4ab

• \: (a + b)( {a}^{2}   -ab   +  {b}^{2}  ) =  {a}^{3}  +  {b}^{3}

• \: (a  -  b)( {a}^{2}    + ab   +  {b}^{2}  ) =  {a}^{3}   -  {b}^{3}

• \:   {( \frac{a + b}{2} )}^{2}  - ( {\frac{a - b}{2} } )^{2}  = ab

You might be interested in
Please help me with these I'm lost
Inessa [10]
Y = (2/3)x + 6
3y - 5x = 9

find an expression for y from the second equation:-
y = (5/3)x + 3
Now substitute this for y in the first equation:-
(5/3) x + 3 = (2/3)x + 6  Now solve for x:-
(5/3)x - (2/3)x  = 6 - 3
x = 3
Now plug x = 3 into the second equation to find the value of y:_
3y - 5(3) =9
3y = 15+9 = 24
y = 8
So the solution is x = 3, y = 8

written as a set this is {3,8}.
3 0
3 years ago
112 is 80% of what number?
Ganezh [65]
112 is 80% of 140.
80% can be written as 0.80 or 0.8.
how i got 140 is by finding the x value of this equation: 0.8x=112
to find the x, i divided 0.8 from both sides, 
0.8 divided by 0.8 cancel out.
112 divided by 0.8 is 140. 
therefore, 112 is 80% of 140
4 0
3 years ago
? Times 4/5 = 1<br> Short answer please and thx
Burka [1]

Answer:

x = 5/4

Step-by-step explanation:

(x)4/5=1

Simplify both sides of equation

4/5x=1

Multiply both sides by 5/4

5/4*4/5x = 1*5/4

x=5/4

8 0
4 years ago
Professor Mallory determines the distribution of students on five variables in her target population. She then uses nonprobabili
rodikova [14]

The sampling strategy she use was a quota.

Quotas are meant to establish boundaries on the number of specific goods that are allowed to be lawfully imported into the country throughout a distinct period of time. In that, quotas are similar embargoes, except quotas don´t have explicit political purposes as embargoes do.

A Fixed quota would be a maximum amount not to be surpassed, while a tariff rate surcharge allows it, but with a higher duty.

7 0
3 years ago
Someone help plsss i don’t understand these are my last points no one doesn’t answer my question
UkoKoshka [18]

Answer:

for 1 it is the 3rd graph

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Other questions:
  • The same rule is used for addition/subtraction. Answer each question below.
    12·2 answers
  • Ms. Gallegos works 8 hours per day. She made $2,400 for working 10 days. How much money does Ms. Gallegos make per hour?
    10·1 answer
  • Jannus 22.5 gallons of water in the shower. This amount is 7.5 gallons lessen the amount she used for washing clothes. Write and
    13·1 answer
  • Two digits are selected with replacement from the digits 1, 2, 3, 4, 5, and 6.
    11·1 answer
  • You need to order carpet for a room that has a length that is twice its width. If the area of the room is 288 square feet, find
    10·1 answer
  • Which of the following represents the graph of f(x) = 2x + 2?
    5·2 answers
  • Simplify (3^6 ÷ 3^8) × 3^-5<br>FAST PLSSSSS​
    8·2 answers
  • How many do you want to bet nobody is not going to answer this question
    9·1 answer
  • Please. very easy! will give brainliest
    13·2 answers
  • There are 24 hours in a day, At 7 a.m. how many hours are left in the day?
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!