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[2 Mark Question Answer]

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16 questions · timed · auto-graded

Question 62 Marks
If $\left(z-\frac{1}{z}\right)=6$, find the value of : $\left(z+\frac{1}{z}\right)$
Answer
$\pm 2 \sqrt{10}$
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Question 92 Marks
If $\left(x+\frac{1}{x}\right)=4$, find the values of : $\left(x-\frac{1}{x}\right)$
Answer
$\pm 2 \sqrt{3}$
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Question 122 Marks
Using the identity $(a+b)(a-b)=\left(a^2-b^2\right)$, evaluate :
$9 \frac{1}{4} \times 15 \frac{3}{4}$
Answer
$145 \frac{11}{16}$
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Question 132 Marks
Using the identity $(a+b)(a-b)=\left(a^2-b^2\right)$, evaluate :
$3 \frac{1}{3} \times 4 \frac{2}{3}$
Answer
$15 \frac{5}{9}$
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[2 Mark Question Answer] - MATHS STD 8 Questions - Vidyadip