if a+b=6 and a-b=4 find ab
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Answered by
3
given, a+b=6---(1)
a-b=4---(2)
adding (1) and (2) we get
2a=10
a=5
substitute in (1)
b=6-a=6-5=1
b=1
ab=(5)(1)=5
I hope this will help u :)
a-b=4---(2)
adding (1) and (2) we get
2a=10
a=5
substitute in (1)
b=6-a=6-5=1
b=1
ab=(5)(1)=5
I hope this will help u :)
mysticd:
4ab=(a+b)^2-(a-b)^2
4ab=6^2-4^2
4ab=36-16
ab=20/4=5
Answered by
2
b=1
a=5
a*b =20 if we use elimination method u would get answer in simple manner
a=5
a*b =20 if we use elimination method u would get answer in simple manner
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