Question

Find the zeroes of the polynomial of 2x^2-x-1

Answer 1

Step-by-step explanation:

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Answer 2

SOLUTION

${2x}^{2} - x - 1 \\ \\ = > {2x}^{2} - 2x + x - 1 = 0 \\ \\ = > 2x(x - 1) + 1(x - 1) = 0 \\ \\ = > (x - 1)(2x + 1) = 0 \\ \\ = > x - 1 = 0 \: \: \: \: or \: \: 2x + 1 = 0 \\ \\ = > x = 1 \: \: or \: \: x = - \frac{1}{2}$

hope it helps ☺️