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How many No.of integral solution of equations ABCD =770

How many
No.of integral solution of equations ABCD =770
 

Grade:12

2 Answers

anand
15 Points
5 years ago
well the number 770 can be factorized as follow 11*7*5*2 so A can take 4 values,B can take 3 values correspondingly and so on hence the answer is 4! i.e. 24 
Arun
25750 Points
5 years ago
Dear student
 
770 = 2 * 5 * 7 * 11
 
Hence each in ab d can be filled in 4 ways.
Hence
 
4⁴
But if all the answers are positive then also it is valid. Or if any two are negative then also.
 
Hencw toal solution = (4C2 + 2) 4⁴

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