Direct proof

[@seyedali7990]

Bro was not cooking in the last question

[@notericok7695]

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

[@isaacbell1292]

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

[@mrcute4584]

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

[@sebbretro]

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

[@tmac4849]

They could possibly both be negative numbers and still give an answer >= 0. Eg If x=-3 and y=-1.

[@HSJM-tr3pi]

just seeing the comment now, he does say that in the question, both x and y are positive real numbers

[@Sonya-lj3ms]

I appreciate this a lot thanks heap!!

[@mrcute4584]

i didnt understand the last one

[@chrischristensen5755]

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

[@JoelSperanzaMath]

Sorry it wasn't clear Chris. In that last question. To prove that last question, you just reverse the order in which I wrote my working. A false proof, is just a direct proof written backwards.

[@tmac4849]

That doesn't work because your last statement does not equal P