Harshit is in trouble
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answer is 14minutes of Q12
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SOLUTION of 11,
given that
x+ 12 = 160/x
x^2 +12x -160
x^2 + 20 x - 8x - 160 =0
x (x+20) -8(x+20) =0
(x+20)(x-8)=0
x=8 ..................... answer
SOLUTION of 10,
given that
x^2 - 84 = 3(x+8)
x^2 -84 = 3x + 24
x^2 -3x - 108 = 0
x^2 -12x + 9x - 108 = 0
x(x-12) +9(x-12)=0
therefore, x = 12............answer
given that
x+ 12 = 160/x
x^2 +12x -160
x^2 + 20 x - 8x - 160 =0
x (x+20) -8(x+20) =0
(x+20)(x-8)=0
x=8 ..................... answer
SOLUTION of 10,
given that
x^2 - 84 = 3(x+8)
x^2 -84 = 3x + 24
x^2 -3x - 108 = 0
x^2 -12x + 9x - 108 = 0
x(x-12) +9(x-12)=0
therefore, x = 12............answer
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