−20=−2016−36=25−4542−4×9=52−5×942−4×9+81/4=52−5×9+81/442−4×9+(9/2)2=52−5×9+(9/2)2
Considering the formula a2+2ab+b2=(a−b)2, one has
(4−9/2)2=(5−9/2)2√(4−9/2)2=√(5−9/2)24−9/2=5−9/24=54−4=5−40=1
Answer
Here let me simplify your process:
(−2)2=4⟹√(−2)2=√22⟹−2=2⟹−2+2=2+2⟹0=4
QED. Do you see the mistake?
No comments:
Post a Comment