20+x^2-9x Please factorise it and tell the answer
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x² - 9x + 20 = 0
x² - 5x - 4x + 20 = 0
x (x - 5) - 4 (x - 5) = 0
(x - 4) = 0 , (x - 5) = 0
x = 4 , x = 5
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