factorise 40 + 3x – x2
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Answered by
5
40 + 3x – x²
-x²+3x+40
-x²+8x-5x+40
x(-x+8)+5(-x+8)
(x+5)(-x+8)
Answered by
3
Answer:
(- x - 5)(x - 8)
Step-by-step explanation:
40 + 3x - x²
=> -(x² - 3x - 40)
=> -(x² - 8x + 5x - 40)
=> -(x(x - 8) + 5(x - 8))
=> -[(x + 5)(x - 8)]
=> (- x - 5)(x - 8)
are the required factors
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