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
andreev551 [17]
3 years ago
12

I don't remember what it is that I'm doing, as I did the lessons before spring break. Help?

Mathematics
1 answer:
blsea [12.9K]3 years ago
6 0
Extraneous solutions, is answers that we get because of squaring both sides of the radical equation, but in reality, they are not going to be the solutions of  the given equation.
(√(4x+41))²=(x+5)²
4x+41=x²+10x+25
x²+6x-16=0
(x-2)(x+8)=0
x1=2 , x2=-8,
And now we must to check them by substitution into initial equation

√(4x+41)=x+5
1)   x=2,   √(4*2+41)=2+5, √49=7, 7=7 true
2) x=-8,     √(4*(-8)+41)=-8+5,   √9 =-3    false,
so an extraneous solution x=-8
You might be interested in
Evaluate square root 16 minus x when x = 8. Write the answer in simplified radical form.
PtichkaEL [24]
Answer -4
___
-/ 16 = 4 X=8

4-8= -4
3 0
3 years ago
Read 2 more answers
Solve: −4b+4b≥6(−5b+7)−3(b+3)
Mariana [72]

Answer:

Inequality Form:

b ≥ 1

Interval Notation:

[1,∞)

Step-by-step explanation:

4 0
2 years ago
12.2​z ​+ 19.4 = -2.7​z​ + 93.9
Digiron [165]

Answer:

z=5

Step-by-step explanation:

12.2z​+ 19.4 = -2.7​z​ + 93.9

14.9z=74.5

z=5

3 0
3 years ago
Read 2 more answers
Segment addition, how do u solve it? Step by step.
weeeeeb [17]

Answer:

x=7  DO=25  OG=35

Step-by-step explanation:

4x-3+2x+21=60            4(7)-3                  2(7)+21

4x+2x   -3+21                 28-3=25             14+21=35

6x+18=60                     DO=25                  OG=35

60-18=42

6x=42

42/6=7

x=7

5 0
3 years ago
7. The ordered pairs ((-1,-9), (5,9). (7.15)) are included in which function?<br> 14
Sholpan [36]

Answer:

C. y=3x-6

Step-by-step explanation:

6 0
3 years ago
Other questions:
  • What is the length of D?
    15·1 answer
  • Evaluate each expression.
    13·2 answers
  • Help a brother out!!! Math prom worth 20!! And explain please
    14·1 answer
  • How many solutions can a consistent system of linear equations have?
    15·1 answer
  • Solve the following system of equations and show all work. y = 2x^2 y = –3x −1
    13·1 answer
  • A) AAS<br> C) ASA<br> B) SSS<br> D) SAS
    14·2 answers
  • Can someone help me with this I’m sorry I really just don’t know
    6·1 answer
  • Wha is nine less than an unknown number equals 15
    6·2 answers
  • What's the answer to x^2-6x-8?
    5·1 answer
  • Need help with these ASAP
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!