Question

Using quadratic formula find the roots of the following equation

${6x}^{2} + 7x - 20 = 0$
${3x}^{2} + 7x - 6 = 0$
${15x}^{2} - 28 = x$
${x}^{2} + 3x - 3 = 0 \: giving \: your \: answer \: correct \: to \: two \: decimal \: places$


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