MCQ
Which of the following is a quadratic equation ?
- A$(\text{k}+1)\text{ x}^{2}+\frac{3}{2}\text{ x}-5 = 0, \text{k} = -1$
- ✓$\text{x}^{3}-\text{x}^{2}=({\text{x}}-1)^{3}$
- C$\text{x}^{2}+\text{2x}+1=(4-\text{x})^{2}+{3}$
- D$-\text{2x}^{2} = (5-{\text{x}})(\text{2x}-\frac{2}{5})$
