Math, asked by RishitaSurve, 1 year ago

solve both .... please...

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Answers

Answered by gaurav2013c
1
Solution 6.)

(1) 36x = 78^2 - 42^2

=> 36x = (78 +42) (78 - 42)

=> 36 x = ( 120) ( 36)

=> x = 120
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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

Answered by dfgh4
0

 \:q.6. \: (i)  \:  \:  \:  \:  \:  \: 36x =  {78}^{2}  -  {42}^{2}   \\  \\sol \:  \:  \:    =  > 36x = 6084 - 1764 \\  \\  =  > 36x = 4320 \\  \\  =  > x =  \frac{4320}{36 }  \\  \\ x = 120 \\  \\ (ii) \:  \:  \:  \:  \:  \:  \: 6.2x = 8.1 \times 8.1 - 1.9  \times 1.9 \\  \\ sol \:  \:  \:  \:  =  > 6.2x = 65.61 - 3.61 \\  \\   =  > 6.2x = 62 \\  \\   =  > x =  \frac{62}{62}  \times 10 \\  \\  =  > x = 10 \:  \:  \:  \:  \:  \: answer
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