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 one year ago
Can someone guide me through inequality questions?
i) 152yy^2<0
ii) 20x4x^225>0
 one year ago
Can someone guide me through inequality questions? i) 152yy^2<0 ii) 20x4x^225>0

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yociyoci
 one year ago
Best ResponseYou've already chosen the best response.0so now, (y3)(y+5)>0? and y>5 or y<3?

Mertsj
 one year ago
Best ResponseYou've already chosen the best response.1The first part is right. If you multiply two factors and get a positive result, then both factors must be positive or both factors must be negative.

Mertsj
 one year ago
Best ResponseYou've already chosen the best response.1So we see that the solution is y <5 or y>3

yociyoci
 one year ago
Best ResponseYou've already chosen the best response.0oh, alright. What about the second question? I got suck at (2x3)^2 > 0

Mertsj
 one year ago
Best ResponseYou've already chosen the best response.1\[4x^220x+25<0\] \[(2x5)(2x5)<0\]

yociyoci
 one year ago
Best ResponseYou've already chosen the best response.0opps, I was looking at a different one. Yes, I got to (2x5)^2<0

Mertsj
 one year ago
Best ResponseYou've already chosen the best response.1Oh, it will never be less than 0 but of course we already knew that a real number raised to the second power will always be positive or 0 and never less than 0

yociyoci
 one year ago
Best ResponseYou've already chosen the best response.0So there will be no solution in this case, but what if it is (2x5)^2 > 0? Will this work?

Mertsj
 one year ago
Best ResponseYou've already chosen the best response.1Yes. Then it would be all real numbers except 0

yociyoci
 one year ago
Best ResponseYou've already chosen the best response.0Alright! Thank you so much!
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