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Factories:- x² -3√5x-20 |
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Answer» - 20 = 0 [by FACTORISATION method] ⇒ x2 + 5x - 4x - 20 = 0 ⇒ x(x + 5) - 4(x + 5) = 0 (x + 5) (x - 4) = 0 ∴ x = -5 or 4 and Y2 - y - 30 = 0 ⇒ y2 - 6Y + 5y - 30 = 0 ⇒ y(y - 6) + 5(y - 6) = 0⇒ (y - 6) (y + 5) = 0 ∴ y = 6 or - 5 Hence, y ≥ x or x ≤ y |
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