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undeadknight26 (undeadknight26):
Where is the mistake?
undeadknight26 (undeadknight26):
I think it is A!
OpenStudy (primeralph):
Check what you uploaded.
undeadknight26 (undeadknight26):
Try this one?
OpenStudy (primeralph):
You're wrong.
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undeadknight26 (undeadknight26):
step number 7?
or option D?
OpenStudy (akashdeepdeb):
See step no. 7.
They changed 2a to 4a, which is wrong, in the quadratic equation. :)
OpenStudy (anonymous):
in step 6.write ~\pm~ before~ the~ squareroot~on~the~\right.\]
undeadknight26 (undeadknight26):
Oh i see...so it would be step six? Or C?
OpenStudy (akashdeepdeb):
Is there an option like that? @surjithayer
No, the answer is D, step 7 is incorrect.
Step 6 is correct because -c/a is what is added to both sides initially. :)
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OpenStudy (anonymous):
step 7 is also incorrect,
in step 6 when squareroot is taken +- is written before it.
undeadknight26 (undeadknight26):
I am confused now...is it C or D? If it was wrong at step six that could be why step seven is wrong...