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

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

MertsjBest ResponseYou've already chosen the best response.1
The 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.
 one year ago

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

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

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

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

MertsjBest ResponseYou've already chosen the best response.1
Oh, 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
 one year ago

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

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

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