find values of x and y in eq. x/a=y/b ; ax+by=a^2+b^2
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Question
find values of x and y in eq. x/a=y/b ; ax+by=a²+b^²
Solution
Given:-
- x/a = y/b
Or,
- bx - ay = 0 -----------(1)
And
- ax + by = a²+b² --------(2)
multiply by a in equ(1) and b in equ(2)
- abx - a²y = 0
- abx + b²y = b(a²+b²)
_________________Sub. it's
➛ -(a²+b²)y = -b(a²+b²)
➛ y = -(a²+b²)/-(a²+b²)
➛ y = b
keep value of y in equ(1),
➛ bx - a*b = 0
➛ bx = ab
➛ x = ab/b
➛ x = a
Thus
- value of x = a
- Value of y = b
________________
Verification
Keep value of x and y in equ(1)
➛ bx - ay = 0
➛ b*a - a*b = 0
➛ 0 = 0
L.H.S = R.H.S
That's proved.
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