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Solve the equation $3x^2 + 7x - 11 = 0$ by using the quadratic formula. Show every stage of your working, and give your answers correct to 2 decimal places.
Mathematics 0580 · IGCSE · Equations
Equations — practice question
Worked solution & mark scheme
This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Substituting the values into the quadratic formula gives $x=\frac{-7\pm\sqrt{(7)^{2}-4(3)(-11)}}{2\times 3}$” …
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