Ask
your own question, for FREE!
Mathematics
8 Online
OpenStudy (anonymous):
Why can't sqrt(x^4 - 4x^2) = x^2 - 4x?
Still Need Help?
Join the QuestionCove community and study together with friends!
jimthompson5910 (jim_thompson5910):
because sqrt(a+b) does not equal sqrt(a)+sqrt(b)
OpenStudy (anonymous):
Just try squaring x² - 4x (x² - 4x)² = x^4 - 8x³ + 16x² ≠ x^4 - 4x²
jimthompson5910 (jim_thompson5910):
and if it did, then sqrt(4x^2) = 2x and not 4x
Can't find your answer?
Make a FREE account and ask your own questions, OR help others and earn volunteer hours!
Join our real-time social learning platform and learn together with your friends!
Join our real-time social learning platform and learn together with your friends!
Latest Questions
Bounty:
guys I'm losing all my motivation for school work how can I motivate myself to stop being lazy because even while I'm being on my work it still piles up and
albert14ring:
Can you give me suggestions on the fastest and most organized way to be ready early in the morning to go to school without any confusion or delay? The impor
Twaylor:
how to make good breakfast food ingredients : 1 mother flat bread bananas peanut
lovelove1700:
u00bfA quu00e9 hora es tu clase?Fill in the blanks Activity unlimited attempts left Completa.
glomore600:
find someone says that that one person your talking to doesn't really like you should I take their advice and leave or should I ask the person i'm talking t
Addif9911:
Him I dimmed the light that once felt mine, a glow I never meant to lose. I over-read the shadows, let voices crowd the room where only two hearts shouldu20
EdwinJsHispanic:
Poem to my mom who proved my point "You proved my point, I am a failure. but I kinda wish, you were my savior.
Bounty:
guys I'm losing all my motivation for school work how can I motivate myself to stop being lazy because even while I'm being on my work it still piles up and
17 hours ago
0 Replies
0 Medals
albert14ring:
Can you give me suggestions on the fastest and most organized way to be ready early in the morning to go to school without any confusion or delay? The impor
21 hours ago
8 Replies
0 Medals
Twaylor:
how to make good breakfast food ingredients : 1 mother flat bread bananas peanut
16 minutes ago
1 Reply
0 Medals
lovelove1700:
u00bfA quu00e9 hora es tu clase?Fill in the blanks Activity unlimited attempts left Completa.
22 hours ago
2 Replies
0 Medals
glomore600:
find someone says that that one person your talking to doesn't really like you should I take their advice and leave or should I ask the person i'm talking t
1 day ago
5 Replies
0 Medals
Addif9911:
Him I dimmed the light that once felt mine, a glow I never meant to lose. I over-read the shadows, let voices crowd the room where only two hearts shouldu20
3 days ago
4 Replies
0 Medals
EdwinJsHispanic:
Poem to my mom who proved my point "You proved my point, I am a failure. but I kinda wish, you were my savior.
3 days ago
6 Replies
2 Medals