Question

36(a+b) whole square - 49(a-b) whole square. Factorise this

Answer 1

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$\\ = 36(a + b) {}^{2} - 49(a - b) {}^{2} \\ = (6a + 6b) {}^{2} - (7a - 7b) {}^{2} \\ = (6a + 6b + 7a - 7b)(6a + 6b - 7a + 7b) \\ = (13a - b)( - a + 13b) \\ = (13a - b)(13b - a)$

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Answer 2

Answer:

36(a+b)

2

−49(a−b)

2

=(6a+6b)

2

−(7a−7b)

2

=(6a+6b+7a−7b)(6a+6b−7a+7b)

=(13a−b)(−a+13b)

=(13a−b)(13b−a)

Step-by-step explanation:

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