Answered

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Solve the inequality. (Enter your answer using interval notation.)
x^2 ≤ 81

Sagot :

thoa0966

Answer

the answer is -9≤x≤9

Answer:

x = (-9,9)

Step-by-step explanation:

|x |< 9 - seperate the inequality into 2 possible cases

1. x<9, x>0   -x<9, x<0

find the intersection

x = (0,9)    -x<9, x<0

find the intersection again

x = (0,9)   x = (-9,0)

find the union

x = (-9,9)

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