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Solve the quadratic equation 5x2  125 = 0. Show all your steps.
 one year ago
 one year ago
Solve the quadratic equation 5x2  125 = 0. Show all your steps.
 one year ago
 one year ago

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flyinglikeabird?Best ResponseYou've already chosen the best response.0
I know I do something like x^2  b = c
 one year ago

acrossBest ResponseYou've already chosen the best response.0
\[\begin{align} 5x^2125&=0\\ 5x^2&=125\\ x^2&=25\\ x&=\pm5 \end{align}\]
 one year ago

flyinglikeabird?Best ResponseYou've already chosen the best response.0
You just divided by 5?
 one year ago

merchandizeBest ResponseYou've already chosen the best response.1
To solve this by factoring you first must divide the eqn by 5. Then subtract the righthand result. Now you have the diff of 2 squares you should be able to factor it from there.
 one year ago

flyinglikeabird?Best ResponseYou've already chosen the best response.0
Okay, factor what?
 one year ago

merchandizeBest ResponseYou've already chosen the best response.1
(x+5)(x5)=0 i.e x=+5,x=5
 one year ago

flyinglikeabird?Best ResponseYou've already chosen the best response.0
Ohh right! Thank you!
 one year ago
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