Question

for children Day speech in lock down​

Answer 1

Step-by-step explanation:

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$\red{\bold{\underline{\underline{❥Question᎓}}}} </p><p>$❥Question᎓

Q:-Find the value of

$\sqrt{a - b}$

a−b

if

$\frac{8 + 3 \sqrt{7} }{8 - 3 \sqrt{7} } - \frac{8 - 3 \sqrt{7} }{8 + 3 \sqrt{7} } = a + b \sqrt{7}$

$\huge\tt\underline\blue{⛶Answer⛶ }$

⛶Answer⛶

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⟹$\bold{ \frac{8 + 3 \sqrt{7} }{8 - 3 \sqrt{7} } - \frac{8 - 3 \sqrt{7} }{8 + 3 \sqrt{7} } = a + b \sqrt{7}}$⟹

⟹$\bold{ \frac{(8 + 3 \sqrt{7})(8 + 3 \sqrt{7}) - [(8 - 3 \sqrt{7} )(8 - 3 \sqrt{7}) ]}{(8 + 3 \sqrt{7} )(8 - 3 \sqrt{7} )}}$⟹

∵$\bold{ {(a + b)}^{2} - {(a - b)}^{2}$ =

⟹ $\bold{\frac{4 \times 8 \sqrt{7} }{ {(8)}^{2} - {(3 \sqrt{7}) }^{2} } = a + b \sqrt{7} }$⟹

⟹ $\bold{\frac{32 \sqrt{7} }{64 - 63} = a + b \sqrt{7}}$⟹

64−63

32

7

=a+b

7

⟹$\bold{ \frac{32 \sqrt{7} }{1} = a + b \sqrt{7}}$⟹

{7} = a + b \sqrt{7}}[/tex]⟹32

7

⟹$\bold{0 + 32 \sqrt{7} = a + b \sqrt{7} }$⟹0+32

$\bold{\red{On \:comparing\: both \:sides:-}}$Oncomparingbothsides:−

⟹$\bold{a = 0 \: and \: b = 32}$⟹a=0andb=32

⟹$\bold{now \: \sqrt{a - b} = \sqrt{0 - 32} = \sqrt{ - 32 } = \sqrt{ - 2 \times 16} = 4 \sqrt{ - 2} = 4 \sqrt{2} i \: [( {i}^{2} = - 1)}$⟹now

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Answer 2

Answer:

Children’s Day, also named Bal Divas is celebrated on 14th November every year in India. welcome speech for children’s day celebration, Today is Thursday, 14th November we all children and teachers gathered here at school to celebrate Children’s Day in honor of Chacha Nehru. A warm welcome to respected teachers and students. Today I got an opportunity to give a speech on “Children’s Day”. In today’s speech, I depict the significance and the story behind the children’s day celebration. Speech on children’s day in English in an easy manner is as follows. Pandit Jawaharlal Nehru Speech on CHildren’s Day.