Question

Write summary on Haroun meet iff.​

Answer 1

Answer:

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Explanation:

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Answer 2

$\pink{given : } \\ \\ (4a - 7b)(4a + 7b) \\ \\ \blue{soluion : } \\ \\ (4a - 7b)(4a + 7b) \\ \\ 4a(4a + 7b) - 7b(4a + 7b) \\ \\ 4a \times 4a + 4a \times 7b - 7b \times 4a - 7b \times 7b \\ \\ 16 {a}^{2} + 28ab - 28ab - 49 {b}^{2} \\ \\ 16 {a}^{2} - 49 {b}^{2} </p><p> \\ \\ \green{shortcut \: \: \: method}</p><p> \\ \\ \red{ {x}^{2} } </p><p>\red{ - {y}^{2} } </p><p>\pink{ = (x + y)(x - y)} \\ \\ \blue{hence}</p><p> \\ \\ (4a - 7b)(4a + 7b) = {(4a)}^{2} </p><p> - {(7b)}^{2} \\ \\ (4a - 7b)(4a + b) = 16 {a}^{2} - 49 {b}^{2} </p><p>$

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