MCQ 11 MarkIf $\left(x-\frac{1}{x}\right)=3$, then $\left(x^2+\frac{1}{x^2}\right)$ is equal toA7B9✓11Dnone of theseAnswerCorrect option: C. 11CView full question & answer→
MCQ 21 MarkWhat must be added to $\left(4 x^2+20 x+16\right)$ so that it becomes a perfect square?✓9B12C15D20AnswerCorrect option: A. 9AView full question & answer→
MCQ 31 MarkIf $(a-b)=7$ and $a b=9$, then $\left(a^2+b^2\right)=$ ?✓67B31C40D58AnswerCorrect option: A. 67AView full question & answer→
MCQ 41 Mark$(370)^2-(369)^2=$ ?A1B19✓739Dnone of theseAnswerCorrect option: C. 739CView full question & answer→
MCQ 51 Mark$107 \times 93=$ ?A9921✓9951C8881D9631AnswerCorrect option: B. 9951BView full question & answer→
MCQ 61 MarkIf $x+y=7$ and $x y=12$, the value of $\left(x^2+y^2\right)$ is✓25B29C37D49AnswerCorrect option: A. 25AView full question & answer→
MCQ 71 MarkIf $\left(x^2+\frac{1}{x^2}\right)=102$, then the value of $\left(x-\frac{1}{x}\right)$ isA8✓10C12D13AnswerCorrect option: B. 10BView full question & answer→
MCQ 81 MarkIf $\left(x+\frac{1}{x}\right)=4$, then $\left(x^4+\frac{1}{x^4}\right)$ is equal toA190B192✓194D196AnswerCorrect option: C. 194CView full question & answer→
MCQ 91 MarkIf $\left(x+\frac{1}{x}\right)=\frac{17}{4}$, then the value of $\left(x-\frac{1}{x}\right)$ isA4B$\frac{1}{4}$C$\frac{13}{4}$✓$\frac{15}{4}$AnswerCorrect option: D. $\frac{15}{4}$DView full question & answer→
MCQ 101 Mark$\left(x+\frac{1}{x}\right)^2-\left(x-\frac{1}{x}\right)^2=?$A$0$✓4C2D$2\left(x^2+\frac{1}{x^2}\right)$AnswerCorrect option: B. 4BView full question & answer→
MCQ 111 MarkWhich of the following is not equal to $\left(a^2+b^2\right)$ ?A$(a+b)^2-2 a b$B$(a-b)^2+2 a b$✓$\frac{1}{2}\left\{(a+b)^2-(a-b)^2\right\}$D$\frac{1}{2}\left\{(a+b)^2+(a-b)^2\right\}$AnswerCorrect option: C. $\frac{1}{2}\left\{(a+b)^2-(a-b)^2\right\}$CView full question & answer→
MCQ 121 MarkIf $\left(x+\frac{1}{x}\right)=3$, then $\left(x^2+\frac{1}{x^2}\right)$ is equal toA$\frac{10}{3}$B$\frac{82}{9}$✓7D11AnswerCorrect option: C. 7CView full question & answer→
MCQ 131 MarkWhich of the following will be equal to $98 \times 102$ ?A$102^2-98^2$✓$100^2-2^2$C$101^2-2^2$Dnone of theseAnswerCorrect option: B. $100^2-2^2$BView full question & answer→
MCQ 141 Mark$\left(x^4-1\right) \div(x-1)$ is:A$x^3-1$B$x^3$C$(x-1)\left(x^2-1\right)$✓$(x+1)\left(x^2+1\right)$AnswerCorrect option: D. $(x+1)\left(x^2+1\right)$DView full question & answer→
MCQ 151 MarkIf $x^2+\frac{1}{x^2}=627$, then the value of $\left(x-\frac{1}{x}\right)$ is:✓25B26C28D$\sqrt{26}$AnswerCorrect option: A. 25AView full question & answer→
MCQ 161 MarkIf $x-\frac{1}{x}=3$, then the value of $x^4+\frac{1}{x^4}$ is:A121✓119C51D9AnswerCorrect option: B. 119BView full question & answer→
MCQ 171 MarkIf $a p q=(3 p+q)^2-(3 p-q)^2$, then the value of $a$ is:A6B12✓14D24AnswerCorrect option: C. 14CView full question & answer→
MCQ 191 Mark$(3 x+2 y)^2-(3 x-2 y)^2=$A$12 x y$✓$24 x y$C$36 x y$D$24 x^2 y^2$AnswerCorrect option: B. $24 x y$BView full question & answer→