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anonymous
 3 years ago
Solve. 5x2 – 20 = 0
x = 5 and x = 4
x = 4 and x = 2
x = –5 and x = 20
x = 2 and x = –2
anonymous
 3 years ago
Solve. 5x2 – 20 = 0 x = 5 and x = 4 x = 4 and x = 2 x = –5 and x = 20 x = 2 and x = –2

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anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0You can start by: Dividing both the sides by 5..

RadEn
 3 years ago
Best ResponseYou've already chosen the best response.0factorize by using the difference squares formula a^2  b^2 = (a+b)(ab)

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0And you can use here : \[x^2  a^2 = (x + a) (x  a)\]

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Or if you don't wanna do this, then add 4 both the sides and then take square root both the sides.

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0so,... whats the answer ?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Who told you that answer is B?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0\(x^2  4 = 0\) Add 4 both the sides and tell me what did you get?

RadEn
 3 years ago
Best ResponseYou've already chosen the best response.0well, look at how the factorization works x^2  4 = 0 x^2  2^2 = 0 use the diff square formula, (x+2)(x2) = 0 solve for x find the zeroes by make each factor be zero first, x+2=0 subtract by 2 from both sides, x+22 = 02 x = 2 do for the rest!

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0I dont really have to do the rest because there isnt another 2 in the other choices.

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0do for the rest is actually for your own knowledge and not for answer choices you are given with..

RadEn
 3 years ago
Best ResponseYou've already chosen the best response.0ok, show to us how to solve of x  2 = 0 ?
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