factorise 40-18x-x²
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x2 - 18x - 40
x2 - 20x + 2x - 40
x (x-20) + 2 (x-20)
(x-20) (x+2)
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x2 - 20x + 2x - 40
x (x-20) + 2 (x-20)
(x-20) (x+2)
Mark as brainliest please
Answered by
3
Answer:
=> -(x²+18x-40)
=> -(x²+20x-2x-40)
=> -[x(x+20)-2(x+20)]
=> -(x-2)(x+20)
=> (x+20)(2-x)
Step-by-step explanation:
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