anonymous
  • anonymous
Solving Quadratic Equations By Factoring. (x-1)(x+7)=0 x=?
Differential Equations
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
it is already factored
anonymous
  • anonymous
here is a good way of looking at it A*B=0 (x-1)*B=0 x-1=0 would make 0*B=0 no matter what B holds Answer x=1 And A*(x+7) =0 x+7=0 would be A*0=0 no matter what A holds x=-7 as you can see solutions are 1 and -7
anonymous
  • anonymous
oh yea that does make sense, thanks

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anonymous
  • anonymous
OH in general (x-a)(x-b)(x-c)(x-d)... and so on a, b, c, d... are the solutions. The trick is to get it that way tho :P
anonymous
  • anonymous
thanks for the trick, but i would have too answer it like this (x+1) and (x-7). is it saying we basically answer the positive to negative and negative to positive?
anonymous
  • anonymous
You could look at it like that. Here are examples x+a=0 -a would be the answer x-a =0 a would be the answer x-1=0 1 would be the answer x+1=0 -1 would be the answer
anonymous
  • anonymous
yes, because x is also 1
anonymous
  • anonymous
Yup

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