Day 200: CBSE Class 10 Maths

1. A.
   $a = -7, b = -1$
2. B.
   $a = 5, b = -1$
3. C.
   $a = 2, b = -6$
4. D.
   $a = 0, b = -6$

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1. A.
   $\dfrac{2}{5}$
2. B.
   $\dfrac{1}{5}$
3. C.
   $\dfrac{1}{7}$
4. D.
   $\dfrac{2}{7}$

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1. A.
   $\left(x + \dfrac{1}{x}\right)^2 = 2$
2. B.
   $(x - \sqrt{x})^2 + 2x\sqrt{x} = 0$
3. C.
   $(x + 1)^3 = (1 - x)^3$
4. D.
   $(\sqrt{x} + 1)^2 = x^2$

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1. A.
   $72$
2. B.
   $5^{10}$
3. C.
   $2^{10}$
4. D.
   $5^{12}$

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1. A.
   38.2 m
2. B.
   36.4 m
3. C.
   40 m
4. D.
   $(38.2)\sqrt{2}$ m

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