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Grade: 12th pass
        √x+y=11 and x+√y=7 then what is the value of x and y step to step solution
one year ago

Answers : (2)

Chaitya
11 Points
							√x + y = 7 x + √y = 11 Let √x = a and √y = b a + b² = 7 ---------- (1) a² + b = 11 ---------- (2) (1) × a² and (2) × a a³ + a²b² = 7a² ---------- (1) a² + ab = 11a ---------- (2) subtract a²b² – ab = 7a² – 11a ab(ab – 1) = a(7a – 11) b(ab – 1) = (7a – 11) ab² – b = 7a – 11 – b = 7a – ab² – 11 – b = a(7 – b²) – 11 a = (11 – b)/(7 – b²) Let b = 1, 2, ... when b = 2 a = (11 – b)/(7 – b²) = (11 – 2)/(7 – 4) = 9/3 = 3 so a = 3 and b = 2 √x = 3 and √y = 2 x = 9 and y = 4
						
11 months ago
Sachin
13 Points
							√x+y=11x+√y=7Let - x=a² and y=b²Now - a+b²=11           a²+b=7=>a+(7-a²)²=11              [∵b=7-a²]=>a+49+a⁴-14a²=11=>a⁴-14a²+a+38=0=>a⁴-2a³+2a³-4a²-10a²+20a-19a+38=0=>a³(a-2)+ 2a²(a-2)-10a (a-2)+ (a-2)
						
3 months ago
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