request please solve
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pikachu119:
sorry there a square -b square =(a+b) (a-b)
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Q. Factorisation »
(5a - 3b)² - 16b²
= (5a - 3b)² - (4b)²
= [ (5a - 3b) + (4b) ] [ (5a - 3b) - (4b)² ]
= ( 5a - 3b + 4b ) ( 5a - 3b - 4b )
= ( 5a + b ) ( 5a - 7b )
Answer » (5a + b) (5a - 7b)
Identity Used »
a² - b² = (a + b) (a - b)
where,
a² = (5a - 3b)²
b² = (4b)²
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