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
EleoNora [17]
2 years ago
13

Factorise and solve x^2 + 4x -21 = 0

Mathematics
2 answers:
Korvikt [17]2 years ago
3 0

Answer:

(x + 7) (x - 3)

Step-by-step explanation:

Find 2 numbers that add to 4 and multiply to -21

(x + 7) (x - 3)

Ahat [919]2 years ago
3 0

Answer:

(x+7)(x-4) x=-7,4

Step-by-step explanation:

The factors of -21 that add up to 4 are 7 and -3, so put those as your two second values in your binomials and solve for x, in this case being the negative versions of the second term in the binomial

You might be interested in
Given the function y = 4x - 2, what is the value of y when x = 2 ?
jek_recluse [69]

Answer:

i think it's a

Step-by-step explanation:

4 0
2 years ago
Use substitution to solve the system of equations. Write your solution in decimal form
Lera25 [3.4K]

Answer:

(1.6, 7.02)

Step-by-step explanation:

5 more brainliest for expert : )

4 0
2 years ago
Use the following graph for questions 1 - 4. Rise is the vertical change of
aksik [14]

Answer:

C 2

Step-by-step explanation:

because every time you go 1 to the side you also go 2 up

7 0
3 years ago
Read 2 more answers
Carla figures she spends 21% of her income on food. which fraction is a good estimate for 21%
blsea [12.9K]
21/100
Because that’s what I think it is
7 0
3 years ago
Evaluate 6^2 - (9 divided by x) when x = 3
Zarrin [17]

Answer:

33

Step-by-step explanation:

3 0
2 years ago
Other questions:
  • FREE POINTS!!<br><br> Right answer only please! :))
    10·2 answers
  • What is the solution for X when y is equal to 0 in the quadratic function<br> Y=X^2-100
    7·1 answer
  • If the sum of the zereos of the quadratic polynomial is 3x^2-(3k-2)x-(k-6) is equal to the product of the zereos, then find k?
    15·1 answer
  • PLEASE HELP QUICKLY!!<br> Look at the graph.
    10·1 answer
  • How would the expression(x^2+4) (y^2+4) be rewritten using two squares?
    12·2 answers
  • Given A is between Y and Z, and YA=14x, AZ=10x and YZ=12x+48, solve for x​
    5·1 answer
  • on a game show, sheila was asked 6 questions and missed all 6. Her total score was -90 points. If each missed question was worth
    14·2 answers
  • I need help on this please?
    8·2 answers
  • IM SICK OF ALL THE FAKE LINKS! Can I get help?
    8·1 answer
  • Why is 40x-16 not equivalent?<br> Please help (i’m in 7th grade)
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!