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Five times of a positive whole number is 3 less than twice the square of the number.the number is |
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Answer» LET the number be x, 5 times of x = 5x 3 less than twice of square of x = 2x² - 3 In question, → 5x = 2x²- 3 → 2x² - 5x - 3 = 0 → 2x² - (6 - 1)x -3 = 0 → 2x² - 6x + x - 3 = 0 → 2X(x -3) +1(x-3) = 0 → (x -3) (2x +1) = 0 x = 3 or x = (-1/2) x can't be negative (Given in the QUESTION), so number is 3 |
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