18/x-y - 18/x+y =9
18/2x-y - 18/ 2x+y = 1
How to solve this equation
Answers
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
Step-by-step explanation:
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