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Indicate and explain the logical error in the following set of algebraic expressions
Let a=b

square both sides to get a^2=b^2


Since a=b, then a^2=a*b

Subtract b^2 from both sides a^2-b^2=a*b-b^2

Factor both sides: (a+b)(a-b)=b(a-b)

Divide both sides by (a-b)


Since a=b

b+b=b or


Divide by b

  • ALgebra - ,

    You said " Divide both sides by (a-b) " , but a = b

    so you are dividing by zero, which is a no-no in math .

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