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प्रश्न
(x + 4) and (x – 5) are the factors of ___________
विकल्प
x2 – x + 20
x2 – 9x – 20
x2 + x – 20
x2 – x – 20
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उत्तर
(x + 4) and (x – 5) are the factors of x2 – x – 20
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