if (a+b)=6 & (a-b)=4; find:- (i) ab
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a+b=6
a-b=4
adding
2(a)=10
a=5
similarly
b=1
=> ab=5
a-b=4
adding
2(a)=10
a=5
similarly
b=1
=> ab=5
Similar questions
A-B=4–———-(2)
Add both the equations..
A+B=6
A-B=4
2A =10
There fore, A =5
Substituting value of A in any of the two equations…
Here we substitute in (2)
So, -B =4-A
Therefore,B=1
AB =(5)(1)=5
Hope it helped u get the solution