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AravindG
Group Title
what us completing the square method..i knew it but frgt can anyone help me ?
 2 years ago
 2 years ago
AravindG Group Title
what us completing the square method..i knew it but frgt can anyone help me ?
 2 years ago
 2 years ago

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lgbasallote Group TitleBest ResponseYou've already chosen the best response.2
do you want a demonstration?
 2 years ago

AravindG Group TitleBest ResponseYou've already chosen the best response.1
general involving a ,b c and if possible a demonstration also
 2 years ago

AravindG Group TitleBest ResponseYou've already chosen the best response.1
it seems this method is pretty useful for solving quadratics thats why i am revising it
 2 years ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.2
firstly.... you agree that \[ax^2 + bx + c = 0\] that's the quadratic equation, yes?
 2 years ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.2
now..divide ALL terms by a...what do you get?
 2 years ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.2
where's the x?
 2 years ago

AravindG Group TitleBest ResponseYou've already chosen the best response.1
x^2+(b/a)x+(c/a)=0
 2 years ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.2
now subtract c/a from both sides
 2 years ago

AravindG Group TitleBest ResponseYou've already chosen the best response.1
\[x^2+(b/a)x=c/a\]
 2 years ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.2
good. now divide b/a by 2..what do you get?
 2 years ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.2
yes... but don't touch the equation yet
 2 years ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.2
just divide b/a by 2
 2 years ago

AravindG Group TitleBest ResponseYou've already chosen the best response.1
\[(x+b/2a)^2=(4cb^2)/4a\]
 2 years ago

AravindG Group TitleBest ResponseYou've already chosen the best response.1
4c+b^2 srry
 2 years ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.2
why is it  b^2
 2 years ago

AravindG Group TitleBest ResponseYou've already chosen the best response.1
4c+b^2 srry
 2 years ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.2
\[x^2 + (\frac ba)x + \frac{b^2}{4a^2} = \frac ca + \frac{b^2}{4a^2}\] \[\implies (x + \frac ba)^2 = \frac{b^2  4ac}{4a^2}\] you rushed too fast
 2 years ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.2
now take the square root of both sides
 2 years ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.2
do you need further help?
 2 years ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.2
okay then
 2 years ago

AravindG Group TitleBest ResponseYou've already chosen the best response.1
@lgbasallote can you tell me how we can say that this method will be easier when we have an arbitrary quadratic?i mean is there any relation btw a,b,c so that i can recognise "AHA I CAN USE COMPLETING THE SQUARE HERE INSTEAD OF OTHER METHODS!"
 2 years ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.2
you can use completing the square method anywhere
 2 years ago
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