How many ordered pairs of intergers (x ; y) such that x-2xy+y=0?
How many ordered pái of interger (x;y) that satisfy the equation \(2x^2+y^2+xy=2\left(x+y\right)\)
4x2+y2+2xy=4x+4y
=>(x2+2xy+y2)+3x2+y2-4x-4y=0
=> (x+y)2+3\(\left(x^2-\dfrac{4}{3}x\right)+\left(y^2-4y\right)=0\)
=> (x+y)2+3\(\left(x^2-2.\dfrac{4}{6}+\dfrac{16}{36}-\dfrac{16}{36}\right)+\left(y^2-4y+4\right)-4=0\)
=> (x+y)2+3\(\left(x-\dfrac{4}{6}\right)^2-\dfrac{4}{3}+\left(y-2\right)^2-4=0\)
=> (x+y)2+3\(\left(x-\dfrac{4}{6}\right)^2+\left(y-2\right)^2=\dfrac{16}{3}\)
How many pairs of perpendicular lines in letter T? *
3
2
4
1
How many pairs of (m,n) are there such that m^2 +n^2 =50
Answer: pairs.
Có 8 cặp (1;7)(-1:-7)(7;1)(-7;-1)(5;5)(-5;5)(5;-5)(-5;-5)
The number of ordered pairs (x; y) where x, y ∈ N* such that x2y2 - 2(x + y) is perfect square is .......
The number of ordered pairs (x; y) where x, y ∈ N* such that x2y2 - 2(x + y) is perfect square is ..
How many pairs of two-digit natural numbers have a diference equal to 40
Answer:......pairs
How many pairs of two - digit natural numbers have a difference equal to 40?
Dịch là thế này đúng không bạn:
có bao nhiêu cặp mềm I - chữ số tự nhiên con số có một sự khác biệt bằng 40
Có bao nhiêu cặp hai - chữ số tự nhiên con số có một sự khác biệt bằng 40 ?
The number of ordered pairs (x; y) where x, y ∈ N* such that x 2 y 2 - 2(x + y) is perfect square
is ...........