solve both .... please...
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Solution 6.)
(1) 36x = 78^2 - 42^2
=> 36x = (78 +42) (78 - 42)
=> 36 x = ( 120) ( 36)
=> x = 120
___________________
2.) 6.2 x = (8.1) (8.1) - (1.9)(1.9)
=> 6.2 x = ( 8.1)^2 - (1.9)^2
=> 6.2 x = ( 8.1 - 1.9) ( 8.1 +1.9)
=> 6.2 x = ( 6.2) ( 10)
=> x = 10
(1) 36x = 78^2 - 42^2
=> 36x = (78 +42) (78 - 42)
=> 36 x = ( 120) ( 36)
=> x = 120
___________________
2.) 6.2 x = (8.1) (8.1) - (1.9)(1.9)
=> 6.2 x = ( 8.1)^2 - (1.9)^2
=> 6.2 x = ( 8.1 - 1.9) ( 8.1 +1.9)
=> 6.2 x = ( 6.2) ( 10)
=> x = 10
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