MCQ 11 MarkThe quadratic equation $x^2+m(2 x+m-1)+2=0$ has equal roots. The value of $m$ is :A$1$B$2$C$-2$D$0$AnswerSelfView full question & answer→
MCQ 21 MarkThe quadratic equation $(m+1) x^2+2(m+3) x+(m+8)=0$ has equal roots. The value of $m$ is :A$\frac{1}{3}$B$\frac{1}{4}$C$3$D$-3$AnswerSelfView full question & answer→
MCQ 31 MarkGiven the quadratic equation $x^2+2 \sqrt{2} x+1=0$. The roots of the quadratic equation are :A$\frac{-\sqrt{2} \pm 1}{2}$B$\frac{\sqrt{2} \pm 1}{2}$C$\sqrt{2} \pm 1$D$-\sqrt{2} \pm 1$AnswerSelfView full question & answer→
MCQ 41 MarkThe roots of the quadratic equation $2 x^2-k x+k=0$ are equal. If $k \in N$, then $k$ is equal to :A$0$B$8$C$6$D$-6$AnswerSelfView full question & answer→
MCQ 51 MarkFor the quadratic equation $3 x^2+7 x+8=0$, the roots are :Areal and distinctBreal and equalCimaginaryDboth (a) and (b)AnswerSelfView full question & answer→
MCQ 61 MarkGiven a quadratic equation $m x^2+8 x-2=0, m \neq 0$. For this quadratic equation the value of discriminant is :A$64-8 m$B$\sqrt{64+8 m}$C$64+8 m$D$\sqrt{8 m-64}$AnswerSelfView full question & answer→
MCQ 71 MarkFor the quadratic equation $2 x^2+a x-a^2=0$, the sum of the roots is :A$\frac{a}{2}$B$-\frac{a}{2}$C$2 a$D$-a$AnswerSelfView full question & answer→
MCQ 81 MarkFor the quadratic equation $9 x^2+6 x+1=0$, the discriminant is :A$+$ veB$-$ veC$0$DimaginaryAnswerSelfView full question & answer→
MCQ 91 MarkFor the quadratic equation $2 x^2-3 x+1=0$, the discriminant is :A$1$B$-1$C$0$D$9$AnswerSelfView full question & answer→
MCQ 101 MarkFor the quadratic equation $2 x^2-4 x+1=0$, the discriminant is :A$0$B$+$ veC$-$ veDnone of theseAnswerSelfView full question & answer→
MCQ 111 MarkFor the equation $3 x^2-4 x-2=0$, the roots are :Areal and equalBreal and unequalCimaginaryDboth (a) and (b)AnswerSelfView full question & answer→
MCQ 121 MarkThe quadratic equation whose roots are $-1,-5$ is :A$x^2+6 x+5=0$B$x^2-6 x+5=0$C$x^2+6 x-5=0$D$x^2-6 x-5=0$AnswerSelfView full question & answer→
MCQ 131 MarkThe discriminant of $x^2-4 x-7=0$ is :A$44$B$\sqrt{44}$C$12$D$-12$AnswerSelfView full question & answer→
MCQ 141 MarkThe roots of the quadratic equation $2 x^2+x-1=0$ are :A$\frac{1}{2}$ or $-1$B$-\frac{1}{2}$ or $1$C$-\frac{1}{2}$ or $-1$D$\frac{1}{2}$ or $1$AnswerSelfView full question & answer→
MCQ 151 MarkOn solving $x^2+4 x-21=0$, we get :A$x=-3$ or $-7$B$x=7$ or $-3$C$x=7$ or $3$D$x=-7$ or $3$AnswerSelfView full question & answer→
MCQ 161 MarkThe discriminant of the quadratic equation $2 x^2-x+3=0$ is :A$24$B$25$C$-23$D$-20$AnswerSelfView full question & answer→
MCQ 171 MarkOne of the roots of $2 x^2-7 x+6=0$, is :A$-2$B$2$C$-\frac{3}{2}$D$4$AnswerSelfView full question & answer→
MCQ 181 MarkThe quadratic equation whose solution set is $\{-2,3\}$, is :A$x^2-3 x-6=0$B$x^2-x+6=0$C$x^2+x-6=0$D$x^2-x-6=0$AnswerSelfView full question & answer→
MCQ 191 MarkIf $3 x^2+8=10 x$, then :A$x=2$ or $\frac{4}{3}$B$x=2$ or 3C$x=3$ or $\frac{4}{3}$D$x=1$ or $\frac{1}{3}$AnswerSelfView full question & answer→
MCQ 201 MarkIf $x^2=3 x$, then :A$x=0$B$x=0$ or $x=3$C$x=3$D$x=0$ and $x=3$AnswerSelfView full question & answer→