Question

prove No.B by LHS and RHS​

Answer 1

Answer:

3x - 7y = 10 --- ( 1 )

xy = -1 ---( 2 )

Do the Square of equation ( 1 ) , we

get ,

( 3x - 7y )² = 10²

( 3x )² + ( 7y )² - 2 × 3x × 7y = 100

9x² + 49y² - 42xy = 100

9x² + 49y² - 42 × ( -1 ) = 100

9x² + 49y² + 42 = 100

9x² + 49y² = 100 - 42

= 58

I hope this helps you.

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Answer 2

Step-by-step explanation:

here is your correct answer

thanx for 20 points ....