A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 one year ago
Solve the inequality :(
anonymous
 one year ago
Solve the inequality :(

This Question is Closed

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I don't even know where to start..

Loser66
 one year ago
Best ResponseYou've already chosen the best response.1let t = x^2 to take it down

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Is that substituting?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0What do we do with it? :s

Loser66
 one year ago
Best ResponseYou've already chosen the best response.1do it first and I guide you more.

Loser66
 one year ago
Best ResponseYou've already chosen the best response.1ok, now solve for quadratic to get t

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0um for x do I change it to t?

Loser66
 one year ago
Best ResponseYou've already chosen the best response.1we will be back to x later. Now, just solve for t

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0for a i just put t? it looks weird lol

anonymous
 one year ago
Best ResponseYou've already chosen the best response.032 = 1,024 .. am I doing this right?

Loser66
 one year ago
Best ResponseYou've already chosen the best response.1complete the square for the left hand sides.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Oh so I have to solve this!! Okay so for the den of 2a I do 2^2? Or 2x^2

Loser66
 one year ago
Best ResponseYou've already chosen the best response.1solve for t, then plug back to t = x^2 to solve for x. I let you finish the stuff.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Okay, but where did you get 16

Loser66
 one year ago
Best ResponseYou've already chosen the best response.1From " complete the square" procedure. Rule: 32/2 =16, hence 16 is the number I need to + its square and then  its square.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So I didnt need to plug this into a quadratic?

Loser66
 one year ago
Best ResponseYou've already chosen the best response.1You did. But the way to solve this problem is not just this, you have many many steps to get the answer. I know it is not easy but no choice for you. Take steps. Understand each step first. So far so good now?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I just dont know what I was supposed to do first

Loser66
 one year ago
Best ResponseYou've already chosen the best response.1Ok, I solve it for you as sample. You follow each step and see the reason why we have to do it.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Okay, Im just not good at math :(

Loser66
 one year ago
Best ResponseYou've already chosen the best response.1\( t^2 32 t 144 > 0\\t^2 32t +16^2 16^2 144 >0\\(t16)^2 > 400 \\(t16)^2 >20^2\)

Loser66
 one year ago
Best ResponseYou've already chosen the best response.1Hence \(t 16 > 20 ~~or ~~t16 <20 \) Case 1: if t 16 >20 , then t 16 20 > 0 . That is t 36 >0 Recall \( t = x^2\) , hence \(x^2 36 > 0\) You can't solve directly from here. You MUST derive like \(x^2 36 > 0\\(x6)(x + 6 ) >0 \) For this case, both (x6) and (x+6) must be the same sign. That is if (x6) >0, (x+6) >0 also. Because (+) *(+) >0 if (x6) <0, then (x+6) <0 also, since ()*() = positive >0

Loser66
 one year ago
Best ResponseYou've already chosen the best response.1If both are >0 , that is x6 >0, x > 6 AND x +6 >0, x > 6 , combine them, you just have x > 6

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Woah :o, but how did you get 400?

Loser66
 one year ago
Best ResponseYou've already chosen the best response.116^2 144 = 400 , move to other sides to get 400dw:1444599855908:dw