Find the zeroes of the following quadratic polynomials and verify the relationship between and the coefficients.
(i) $3 - 7 x$
(ii) ${4 u}^{2} + 8 u$ (iii) $t^{2} - 15$

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Solution

$i) 3 - 7 x = 0 7 x = 3 x = \frac{3}{7} i i) 4 u^{2} + 8 u = 0 u^{2} + 2 u = 0 u = 0; - 2 t^{2} - 15 = 0 t^{2} = 15 t = \sqrt{15}$

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Question 1 (iv)
Find the zeroes of the following quadratic polynomials and verify the relationship between the zeroes and the coefficients.

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