Question

X square+3+√5 হলে X- square=3-√5 ( সত্য বা মিথ্যা)​

Answer 1

Answer:

x+y=7

• xy=11

• x-y=?

As we know

• (x+y{)}^2 - (x-y{)}^2 = 4xy(x+y)

2

−(x−y)

2

=4xy

Putting the values

• (7{)}^2 - (x-y{)}^2 = 4(11)(7)

2

−(x−y)

2

=4(11)

• 49 - (x-y{)}^2 = 4449−(x−y)

2

=44

• - (x-y{)}^2 = 44 - 49−(x−y)

2

=44−49

• - (x-y{)}^2 = - 5−(x−y)

2

=−5

Cancellation of Minus

• (x-y{)}^2 = 5(x−y)

2

=5

Taking square root both hand sides

\sqrt{(x-y{)}^2} = \sqrt{5}

(x−y)

2

=

5

• (x-y) = 5(x−y)=5

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