MCQ
निम्नलिखित में कौन द्विघात समीकरण है?
- A$(x+1)(x-1)=x^2-4 x^3$
- ✓$(x+4)^2=3 x+4$
- C$4 x+\frac{1}{2 x}=8 x^2$
- D$\left(2 x^2+4\right)=(5+x)(2 x-3)$
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