Use split method 2x^2-90x-4500
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given :- 2x² - 90x - 4500
= x² - 45x - 2250
= x² - (75x - 30x) - 2250
= x² - 75x + 30x - 2250
= x(x - 75) + 30(x - 75)
= (x - 75) (x + 30)
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