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anonymous
 one year ago
Solve this please! Will medal for giving an answer!!!
0=2x^2+11x+40
anonymous
 one year ago
Solve this please! Will medal for giving an answer!!! 0=2x^2+11x+40

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ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.2Hint : (16)(5) = 80 16 + 5 = 11

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.2As a start, split the middle term as `16x  5x`

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.20 = 2x^2 + `11x` + 40 = 2x^2 + `16x5x` + 40

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0wow i would have never thought of that!

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.2knw how to finish it off ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0how did you figure that out?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yeah i can finish it off but i'm intrigued on how you found those numbers

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.2basically we need to find two integers such that they multiply to `(40)*(2)` and add up to the coefficient of middle term `11`

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.2so you look at the factors of 40*2 : 40*2 = 10*4*2 = 5*2^4 = 5*16 and you see that 16 and 5 are the magic numbers

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.2quadratic formula is always there if you don't like to do all that

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.2dw:1440046082224:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yeah of course I know that, haha

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0but It seemed like there was a shorter way so I asked

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0But really appreciate your work.

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.2im not sure if we can say that factor by grouping is any shorter than using the quadratic formula directly... factor by grouping doesn't work always, it works only when the roots are rational

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.2usually i try factor by grouping first, if it doesn't work then i use quadratic formula..
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