x^2-y^2=2=(x-y).(x+y)
ta co bang
x-y 1 2 -1 -2
y+x 2 1 -2 -1
x 1.5 -1.5
y 0.5 -0.5
Đúng 0
Bình luận (0)
Các câu hỏi tương tự
Assume that two numbers x and y satisfy: 2x + y = 6.
Find the minimum value of expression A = 4x2 + y2
For positive real numbers x,y,z so that: x+y+z = 3. Find the minimum value of expression
A = 1/( x^2 + x) + 1/(y^2+ y) +1/( z^2 +z)
The smallest value of A = ( x - y ) / x^4 + y^4 + 6
Find the value of m such that x^4– mx^2 + 6 is divisible by x^2 – 1. Answer: m =
Given x+y=2 then the value of 3x +1 + 3y -2xy - x^2 - y^2 is ??????
Lesson 1: analyzing the polynomial factors.Notes + 2 x-1x 3 + 6x2 + 11x + 6x 4 + 2 x 2-3AB + ac + b2 + 2bc + c2A3-b3 + c3 + 3abcLesson 2: for functions: search conditions of x to A means.A shortening.Computer x to A 1.Post 3: prove the inequality:For a + b + c 0. Prove that: a3 + b3 + c3 3abc.For a, b, c are the sidelengths of the triangle. Proof that:Prove that x 5 + y5 ≥ x4y + xy4 with x, y ≠ 0 and x + y ≥ 0Lesson 4: solve the equation:x 2-3 x + 2 + | x-1 | 0Lesson 5: find the largest and...
Đọc tiếp
Lesson 1: analyzing the polynomial factors.
Notes + 2 x-1
x 3 + 6x2 + 11x + 6
x 4 + 2 x 2-3
AB + ac + b2 + 2bc + c2
A3-b3 + c3 + 3abc
Lesson 2: for functions:
search conditions of x to A means.
A shortening.
Computer x to A < 1.
Post 3: prove the inequality:
For a + b + c = 0. Prove that: a3 + b3 + c3 = 3abc.
For a, b, c are the sidelengths of the triangle. Proof that:
Prove that x 5 + y5 ≥ x4y + xy4 with x, y ≠ 0 and x + y ≥ 0
Lesson 4: solve the equation:
x 2-3 x + 2 + | x-1 | = 0
Lesson 5: find the largest and smallest value (if any)
A = x 2-2 x + 5
B =-2 x 2-4 x + 1.
C =
Lesson 6: calculate the value of expression.
Know a – b = 7 feature: A = (a + 1) a2-b2 (b-1) + ab-3ab (a-b + 1)
For three numbers a, b, c is not zero catches up deals for equality:
Computer: P =
Article 7: proof that
8351634 + 8241142 divisible 26.
A = n3 + 6n2-19n-24 divisible by 6.
B = (10n-9n-1) divisible 27 with n in N *.
Article 8:
In the motorcycle race three cars depart at once. The second car in a one-hour run slower than the first car 15 km and 3 km third cars. rapidly should the destination more slowly the first car 12 minutes and the third car earlier today. No stops along the way. Calculate the speed of each car, race distance and the time each car
Given 5x+y−2z=37,3x−y+2z=11
Find the value of the following expression x+2y−4z.
Cho x,y là 2 số thỏa mãn x^2 - y^2 =2. Vậy giá trị của biểu thức A=2(x^6 - y^6)- 6(x^4+y^4) là A=...
23 tháng 10 2016 lúc 13:59
Suppose \(x\)and\(y\)are 2 real numbers such that :
\(\hept{\begin{cases}x+y-xy=55\\x^2+y^2=325\end{cases}}\)
Find the value of \(\left|x^3-y^3\right|\).