a(a+b)=36 and b(a+b)=64 find a-b
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this is the answer........
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kartiksaini200p8mkgl:
nope
ans is -2.8
i didn't substitute the value of a+b
yes maam after substituting it ans will come
yes that solve
thnx maam
you are welcome
;)
Answered by
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If a(a+b)=36 so a^2+ab=2 and if b(a+b)=64 so ab+b^2=64. See it carefully you will find an identity between them which is (a+b)^2=100
so a+b=10 by transposing the sq. to the RHS.
We have got the value of a+b so by substituting it value to the question we get a(10)=36 and b(10)=64. Now transpose 10 to the RHS and we will get a=3.6 and b=6.4 .
According to question we have to find the value of a-b which is equal to 3.6-6.4=-2.8 which is your answer.
so a+b=10 by transposing the sq. to the RHS.
We have got the value of a+b so by substituting it value to the question we get a(10)=36 and b(10)=64. Now transpose 10 to the RHS and we will get a=3.6 and b=6.4 .
According to question we have to find the value of a-b which is equal to 3.6-6.4=-2.8 which is your answer.
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