Factorise : a 2 - 3a - 40

Given, a 2 - 3a - 40 = a 2 - 8a + 5a - 40 = a(a - 8) + 5(a - 8) = (a - 8)(a + 5). Hence, a 2 - 3a - 40 = (a - 8)(a + 5).

Mathematics

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Given,

a² - 3a - 40

= a² - 8a + 5a - 40

= a(a - 8) + 5(a - 8)

= (a - 8)(a + 5).

Hence, a² - 3a - 40 = (a - 8)(a + 5).

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