Proof that 2=1: Difference between revisions

Revision as of 12:17, 10 July 2019

/request delete

@@ Line 1: / Line 1: @@
-) <math>a = b</math>. Given.
+/request delete
-) <math>a^2 = ab</math>. Multiply both sides by a.
-) <math>a^2-b^2 = ab-b^2</math>.  Subtract <math>b^2</math> from both sides.
-) <math>(a+b)(a-b) = b(a-b)</math>.  Factor both sides.
-) <math>(a+b) = b</math>. Divide both sides by <math>(a-b)</math>
-) <math>a+a = a</math>.  Substitute <math>a</math> for <math>b</math>.
-) <math>2a = a</math>.  Addition.
-) <math>2 = 1</math>.  Divide both sides by <math>a</math>.
-Wait, What?