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
12345 [234]
3 years ago
14

Solve by factorising x^2 + 8x + 15 = 0

Mathematics
1 answer:
Nutka1998 [239]3 years ago
3 0

Answer:

See below

Step-by-step explanation:

x² + 8x + 15 = 0

x² + 5x + 3x + 15 = 0

x x (x + 5) + 3x + 15 = 0

xx (x + 5) +3 (x + 5) = 0

(x + 5) × (x + 3) = 0 → x + 5 = 0       x + 3 = 0

x = -5

x + 3 = 0

x = -5

x = -3

x1 = -5

x2 = -3

Hope this helped ! :)

You might be interested in
You can tell that pi is an irrational because it has a what
8090 [49]

I'll guess the answer is <em>you can tell that pi is an irrational because it has a </em>non-terminating yet non-repeating decimal representation.<em> </em>

Of course it's not clear how we tell this.  We can't know for sure just by looking at the first trillion digits we've figured out whether it repeats or not.  Someone told us it didn't, that's really how we know.


3 0
3 years ago
Can someone help me for this question please? Why I got wrong answer. ASAP!!!
Snowcat [4.5K]

Answer:

a=8.06

A=29.74

B=60.26

Step-by-step explanation:

This is a right angled triangle and Pythagoras theorem is to be obeyed.

To get c, we follow the Pythagoras rule that says

Hyp² = Opp² + Adj²

c= Hypotenuse

c²= a² + b²

c² = 4² + 7²

c² = 65

c = √65 = 8.06

For angle A,

the opposing side to the angle = a = 4

The adjacent side to the angle = b = 7

Following trigonometry rule.

Tan A = opp/adj

Tan A = 4/7

A = Tan–¹(4/7)

A = 29.74°

For angle B,

Opposing side = 7

Adjacent side = 4

Tan B = 7/4

B = Tan-¹(7/4)

B = 60.26°

5 0
3 years ago
The slope of 4 and line passes through the point (-3, 1)​
Irina-Kira [14]
Go up on the graph (y axis) and you need to go down 3 on the y axis and go to the right one and repeat. let me know if you want me to draw it out!
6 0
3 years ago
HELP ASAP!<br> Find the value of x. -1x + 72 = -3x + 84
hoa [83]

Answer:

x=6

Step-by-step explanation:

First, add x to each side.

72=-2x+84

Subtract 84 from each side

-12=-2x

Dive each side by -2

6=x

8 0
3 years ago
Read 2 more answers
PLZ I NEED HELP NOW!!!!!!!
taurus [48]

Answer:

D

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Other questions:
  • A can of juice has a diameter of 6.6 centimeters and a height of 12.1 centimeters. What is the total volume of a six pack of jui
    6·1 answer
  • I need an explanation of this question: the chicago cubs have won more than 100 games
    14·2 answers
  • An environmentalist group collects a liter of water from each of 52 random locations along a stream and measures the amount of d
    6·1 answer
  • Does 1+1=fish??????????
    12·1 answer
  • I WILL MARK THE BRAINLIEST! I NEED HELP NOW!Ashton is constructing the bisector of MN¯¯¯¯¯¯¯.What should Ashton do for his first
    11·2 answers
  • What is 15% of a circlee in degrees
    7·2 answers
  • Jason walked 70 miles in 8 days. Find the unit rate
    6·1 answer
  • Please hurry. It’s due in 20 minutes
    13·1 answer
  • ANSWER ASAP!! DUE SOON! ONLY ANSWER IF YOU ARE CORRECT, I CANNOT GET THIS WRONG!!!
    14·1 answer
  • The box plot below represents some data set. What is the interquartile range (IQR) of the data?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!