Direct proof

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Bro was not cooking in the last question

seyedali
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The only video that I could understand fully about direct proofs. Thanks

notericok
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that doesn't imply that 2 of them are + numbers. inside of the parentheses could be negative and its square would be positive ..

mrcute
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Hi, I am a bit confused with you assumption on the last example, as y could be negative and still allow the answer to be greater than 0

sebbretro
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thx browski, this banger definitley made me pass math this term

isaacbell
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so how are we supposed to solve the last one? you did not explain that very well at all

chrischristensen