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Can you spot the issue?
First, we make a statement:
a = b
Then, multiply both sides by a:
a2 = ab
And then, subtract b2 from both sides:
a2 - b2 = ab - b2
(a - b) (a + b) = b (a - b)
After that we eliminate (a-b) from both sides:
(a - b) (a + b) = b (a - b)
a + b = b
And substitute b with a since they are the same:
a + a = a
2a = a
2a = a
2 = 1
Email us with the answer.