Math, asked by pshank, 1 year ago


18/x-y - 18/x+y =9
18/2x-y - 18/ 2x+y = 1
How to solve this equation

Answers

Answered by nikki1231
3
given,

18/x-y - 18/x+y = 9

=>18(x+y)-18(x-y)/x²-y² = 9

=>18x+18y-18x+18y/x²-y²=9

=>36y/x²-y²=9

=>4y=x²-y²................(1)

18/2x-y - 18/2x+y = 1

=>18(2x+y)-18(2x-y)/4x²-y²=1

=>36x+18y-36x+18y=4x²-y²

=>36y=4x²-y²............(2)

(2)/(1) => 36y/4y = 4x²-y²/x²-y²

=>9=4x²-y²/x²-y²

=>9x²-9y²=4x²-y²

=>5x²-8y²=0

=>x²=8y²/5...............(3)

substitute (3) in (1)

=>4y=8y²/5 - y²

=>4y=8y²-5y²/5

=>20y=3y²

=>20/3=y...............(4)

substitute (4) in (1)

=>4(20/3) = x² - (20/3)²

=>80/3=x²-400/9

=>80/3+400/9=x²

=>240+400/9=x²

=>640/9=x²

=>√640/√9=x

=>25.29/3=x

HOPE​ U UNDERSTAND

PLS MARK IT AS BRAINLIEST

nikki1231: I think the answer is correct but i am not sure
nikki1231: pls mark it as brainliest
nikki1231: pls mark it as brainliest plz...
pshank: ur ans is correct .am ready mark.. but i don't know where is brainliest..U give link brainliest ..i mark it
pshank: only option available.. thanks and comment and share .. where brainliest option
Answered by Anonymous
3

Step-by-step explanation:

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