Mathematics
Factorise :
a2 - 3a - 40
Factorisation
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Answer
a2 - 3a - 40
= a2 + (- 8 + 5)a - 40
= a2 - 8a + 5a - 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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Factorise :
a2 - 3a - 40
6 Likes
a2 - 3a - 40
= a2 + (- 8 + 5)a - 40
= a2 - 8a + 5a - 40
= (a2 - 8a) + (5a - 40)
= a(a - 8) + 5(a - 8)
= (a - 8)(a + 5)
Hence,a2 - 3a - 40 = (a - 8)(a + 5)
Answered By
5 Likes