Awais148
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Age: 30 
4076 days old here
Total Posts: 12184
Points : 198
Location:
Attock, Pakistan
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a = b
multiply both sides by a
a^2 = a*b
subtract b^2 from both sides
a^2-b^2 = a*b-b^2
apply the distributive law to both sides
(a+b)(a-b) = b(a-b)
divide both sides by (a-b)
(a+b) = b
substitute all a's for b's (remember, if a = b you can do this)/
a+a = a
regroup the two a's in the left side, and rename it 2a
2a = a
divide both sides by a
2 = 1
The point which I highlighted in red is where you would have to divide each side of
(a+b)(a-b)=b(a-b)
by (a-b) to get
(a+b)=b
thk hai na
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