Mathematics
x(x - 1) - 20 in the form of factors is :
(x - 5)(x + 4)
(x - 5)(x - 4)
(x + 5)(x - 4)
(x + 5)(x + 4)
Factorisation
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Answer
Given,
x(x - 1) - 20
= x2 - x - 20
= x2 - 5x + 4x - 20
= x(x - 5) + 4(x - 5)
= (x - 5)(x + 4).
Hence, Option 1 is the correct option.
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