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lizzy87
 3 years ago
How to solve X^2+10x=24 by completing the square.
lizzy87
 3 years ago
How to solve X^2+10x=24 by completing the square.

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earslan100
 3 years ago
Best ResponseYou've already chosen the best response.0what times what equals 24 and those same numbers have to add upto 10

henpen
 3 years ago
Best ResponseYou've already chosen the best response.1\[x^2+10x=(x+5)^225\] Do you understand this?

earslan100
 3 years ago
Best ResponseYou've already chosen the best response.0no 4 and 6 when u multiply its 24 not 24

earslan100
 3 years ago
Best ResponseYou've already chosen the best response.0srry it has to multiply to 24

henpen
 3 years ago
Best ResponseYou've already chosen the best response.1... or we could actually help him with the mechanics of the question

earslan100
 3 years ago
Best ResponseYou've already chosen the best response.0so the answer is (x2)(x+10)

earslan100
 3 years ago
Best ResponseYou've already chosen the best response.0if you multiply using foils u can see it equals the question

henpen
 3 years ago
Best ResponseYou've already chosen the best response.1Really, that's not completing the square.

henpen
 3 years ago
Best ResponseYou've already chosen the best response.1http://en.wikipedia.org/wiki/Completing_the_square Needs to be in the form (x+k)^2=c

henpen
 3 years ago
Best ResponseYou've already chosen the best response.1Okay, @lizzy87 , do you understand why\[x^2+10x=(x+5)^225\]?

lizzy87
 3 years ago
Best ResponseYou've already chosen the best response.0how didi you get the 5?

henpen
 3 years ago
Best ResponseYou've already chosen the best response.1dw:1346521462011:dw Because 2x5=10

henpen
 3 years ago
Best ResponseYou've already chosen the best response.1And if you take away 25 and cancel the 2 5x's into one 10x, that happens.

lizzy87
 3 years ago
Best ResponseYou've already chosen the best response.0oh ok see how you got that thanks

henpen
 3 years ago
Best ResponseYou've already chosen the best response.1\[x^2+10x=24\] \[x^2+10x=(x+5)^225\] Therefore\[24=(x+5)^225\] and\[49=(x+5)^2\]

henpen
 3 years ago
Best ResponseYou've already chosen the best response.11 Did you understand that 2 What do you think we could do now to simplify?
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