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(i)` 7x^(2) + 16x - 15 = 0` (ii) ` 5y^(2)+ 8y - 21 = 0`A. ` x lt y`B. `x ge y`C. ` x gt y`D. x = y or no relation can be established between x and y |
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Answer» Correct Answer - D (i) ` 7x^(2) + 16x-15 = 0` ` 7x^(2) + 21x - 5x -15 = 0` ` 7x(x+3) -5(x+3) = 0` `(7x-5)(x+3) = 0` ` x = 5/7, -3` (ii) ` 5y^(2) + 8y - 21 = 0` ` 5y^(2) + 15y - 7y - 21 = 0` ` 5y(y+3) -7(y+3) = 0` ` (5y - 7) (y + 3) = 0` ` y = 7/5, -3` `:. ` No relation can be established between x and y. |
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