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aceaceBest ResponseYou've already chosen the best response.0
\[\left x^2 1 \right \le 4\]
 one year ago

aceaceBest ResponseYou've already chosen the best response.0
i got x is less than or equal to root 5 / x is greater than or equal to root negative 3
 one year ago

AmmarahBest ResponseYou've already chosen the best response.0
Could u give me a medal first plese
 one year ago

aceaceBest ResponseYou've already chosen the best response.0
How do you do this question? O.o
 one year ago

AmmarahBest ResponseYou've already chosen the best response.0
Medal first please i onlybhelp ppl who give medals
 one year ago

aceaceBest ResponseYou've already chosen the best response.0
Are meant to give medals first?
 one year ago

SqrtBest ResponseYou've already chosen the best response.0
no u answer first then get medals _______________
 one year ago

AmmarahBest ResponseYou've already chosen the best response.0
Ok so u know absolute value is always positive right?
 one year ago

SqrtBest ResponseYou've already chosen the best response.0
The number is not necessarily positive, but the definition is the value by which the number is farthest from zero (distance). Eg 1 and 1 both are 1 unit away from zero. That is why it is represented as a positive number. Also, distance can't be represented as a negative number. (e.g. You can't be 5 km away from home.)
 one year ago

HeroBest ResponseYou've already chosen the best response.1
x²  1 ≤ 4 4 ≤ x²  1 ≤ 4 4 + 1 ≤ x² ≤ 4 + 1 3 ≤ x² ≤ 5 √3 i ≤ x ≤ √5
 one year ago

HeroBest ResponseYou've already chosen the best response.1
Since √3i does not represent distance, the solution should only be written as x ≤ √5
 one year ago

aceaceBest ResponseYou've already chosen the best response.0
what about minus root five?
 one year ago

SqrtBest ResponseYou've already chosen the best response.0
"There is actually no such thing as a plusorminus square root: it is merely language used to save words. For example, the equation x²=9 has two solutions, which are x=3 and x=3. It is tedious to say: “since x²=9, x must be 3 or 3″. As a shortcut, we say: “since x²=9, x must be ±3.” http://www.xamuel.com/plusorminussquareroots/
 one year ago

HeroBest ResponseYou've already chosen the best response.1
x²  1 ≤ 4 4 ≤ x²  1 ≤ 4 4 + 1 ≤ x² ≤ 4 + 1 3 ≤ x² ≤ 5 √5 ≤ x ≤ √5
 one year ago

SqrtBest ResponseYou've already chosen the best response.0
x²  1 ≤ 4 x²≤ 4+1 x²≤5 √x²≤√5 x≤√5
 one year ago
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