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Byju's Answer
Standard VII
Mathematics
Properties of Addition and Subtraction
Use the formu...
Question
Use the formula to find the factors.
(8) 169p
2
– 81r
2
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Solution
169p
2
– 81r
2
= (13p)
2
– (9r)
2
= (13p + 9r) (13p – 9r) [a
2
– b
2
= (a + b) (a – b)]
∴ 169p
2
– 81r
2
= (13p + 9r) (13p – 9r)
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