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CarolineJean
 3 years ago
Can someone explain to me, STEP BY STEP how to do this problem please, its Algebra 2Complex numbers. 6(x+5)^2=120
CarolineJean
 3 years ago
Can someone explain to me, STEP BY STEP how to do this problem please, its Algebra 2Complex numbers. 6(x+5)^2=120

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hartnn
 3 years ago
Best ResponseYou've already chosen the best response.2first divide both sides by 6 what u get ?

hartnn
 3 years ago
Best ResponseYou've already chosen the best response.2and u should know that \(\huge \sqrt{1}=i\)

matricked
 3 years ago
Best ResponseYou've already chosen the best response.06(x+5)^2+120 = (x+5)^2  20i^2 =0 ( and then factorise ) as i^2 =1

1on1
 3 years ago
Best ResponseYou've already chosen the best response.0hartn good explanation and asking for participation . well done !!

richyw
 3 years ago
Best ResponseYou've already chosen the best response.1\[6(x+5)^2=120\]\[(x+5)^2=\frac{120}{6}\]\[x+5=\sqrt{\frac{120}{6}}\]\[x+5=\sqrt{20}\]\[x=\sqrt{20}5\]\[x=\sqrt{20}i5\]\[x=\sqrt{4\cdot 5}i5\]x=2\sqrt{5}i5

Dido525
 3 years ago
Best ResponseYou've already chosen the best response.0Now take the square root of the RHS .

Dido525
 3 years ago
Best ResponseYou've already chosen the best response.0Don't just post the answer...

hartnn
 3 years ago
Best ResponseYou've already chosen the best response.2i don't think @CarolineJean wants any of your solutions, she wants to understand and none of you are helping by giving steps out...

CarolineJean
 3 years ago
Best ResponseYou've already chosen the best response.0@hartnn yeah, thanks :)

richyw
 3 years ago
Best ResponseYou've already chosen the best response.1oops just forgot the \(\pm\)

Dido525
 3 years ago
Best ResponseYou've already chosen the best response.0Now take the square root. What do you get?

Dido525
 3 years ago
Best ResponseYou've already chosen the best response.0I don't think you HAVE to simplify...

richyw
 3 years ago
Best ResponseYou've already chosen the best response.1I dunno it's how I learn. sorry. I will leave.

CarolineJean
 3 years ago
Best ResponseYou've already chosen the best response.0wow thanks everyone that helped alot :O i have a test tomorrow & didn't know how to do this type of problem but i understand now, thanks ^.^

Dido525
 3 years ago
Best ResponseYou've already chosen the best response.0Ohh you understand? :) Good :) .

CarolineJean
 3 years ago
Best ResponseYou've already chosen the best response.0omg the whole time i was trying to figure out how to do it i was trying to figure out how everyone was getting 20... i feel dumb now.... x)

richyw
 3 years ago
Best ResponseYou've already chosen the best response.1if you are following my (huge list) of steps. just don't forget to take bot the positive and negative root. So you should get \(x=2i\sqrt{5}5\) and \(x=2i\sqrt{5}5\)

hartnn
 3 years ago
Best ResponseYou've already chosen the best response.2x=.... OR x=... either of them is a solution, not both

CarolineJean
 3 years ago
Best ResponseYou've already chosen the best response.0yay ! i got that ! @richyw

CarolineJean
 3 years ago
Best ResponseYou've already chosen the best response.0thank you to the only 2 ppl that really explained what to do lol @hartnn @richyw

Dido525
 3 years ago
Best ResponseYou've already chosen the best response.0Not me? ;) . Jk Jk . Glad you understood :) .

CarolineJean
 3 years ago
Best ResponseYou've already chosen the best response.0sorry didn't see yours ! :O @Dido525
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