Factorise x3 - 3x2 - 9x - 5
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Consider the equationx3 – 3x2 – 9x – 5…………………..(1)
The equation can be simplified
as
x3 + x2 – 4x2 – 4x – 5x – 5x2 (x + 1) – 4x (x + 1) -5(x + 1)(x + 1)(x2 – 4x – 5)(x + 1)(x2 – 5x + x – 5)(x + 1) (x – 5)(x + 1)
∴ (x + 1), (x – 5) and (x + 1) are factors of given
Hope it helps uhh
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