Mathematics
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OpenStudy (anonymous):
12b^2-23b-2=0 Solve Equation
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OpenStudy (anonymous):
b=2 or b=-1/12
OpenStudy (anonymous):
Can u please show how me the steps
OpenStudy (anonymous):
Sure 12b^2-24b+b-2=0
12b(b-2)+1(b-2)=0
(12b+1)(b-2)=0
so either b=0 or b=-1/12
OpenStudy (anonymous):
0h it was wondering why the 23b turn into 24b?
OpenStudy (anonymous):
Can you see why now then....
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OpenStudy (anonymous):
no i ment why does the 23b turn into 24b?
OpenStudy (radar):
-23b=-24b+b
OpenStudy (anonymous):
Yeap -23b=-24b+b
OpenStudy (radar):
Perfectly legal, and done in order to factor.
OpenStudy (radar):
Saved you from not using that danged old quadratic formula!
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OpenStudy (anonymous):
what about 12t^2+5t-2=0
OpenStudy (radar):
Let me look at it and see if we can escape the "formula"
OpenStudy (anonymous):
12t^2+8t-3t-2=0
OpenStudy (anonymous):
is that the answer?
OpenStudy (anonymous):
Now factorise
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OpenStudy (radar):
t=-1/2
t=1/3
OpenStudy (anonymous):
either t=1/4 or -2/3
OpenStudy (anonymous):
do you guys have a shortcut for these problems?
OpenStudy (anonymous):
Sorry Radar, your one is incorrect!
OpenStudy (radar):
Oops, I see now those are not the correct factors.
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OpenStudy (radar):
(3t+2)(4t-1) are the correct factors
(3t+2)=0
t=-2/3
4t-1=0
t=1/4
OpenStudy (radar):
Thanks roshan2004, I got off the rail.
OpenStudy (anonymous):
My pleasure..........