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Krish

· started a discussion

· 1 Months ago

doubt (Question: 274664.0 )

why it is not coming with value substitution
a=1,b=0
then m=5,n=3
expression becomes 25+4*5*3-9 not equal to 2(5+3)

Question:

If m(a + b)2 = 5 and n(a – b)2 = 3, then the simplified value of m2(a + b)2 + 4mnab – n2(a – b)2 is—

Options:
A)

m + n

B)

–2(m + n)

C)

–(m + n)

D)

2(m + n)

Solution:

Ans: (d)

  

Vijay Singh Rawat

· commented

· 1 Months ago

4*5*3*0=0

Knowledge Expert

· commented

· 1 Months ago

Dear Student,
The given answer and solution is correct.
We can't always use hit and trail method.

Thanks and Regards
Team TR

Krish

· commented

· 1 Months ago

wrong calculation!! i got
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