Given x + y = 2, xy = 0, find X & # 178; + Y & # 178; and (X-Y) 178;
x²+y²
=(x+y)²-2xy
=2²-0
=4
(x-y)²
=(x+y)²-4xy
=2²-0
=4
RELATED INFORMATIONS
- 1. If X & # 178; - ax + 2a-4 is a complete square, find the value of A
- 2. If the binomial trinomial X & # 178; - ax + 2a-3 of X is a complete square, then the value of a is
- 3. Given A-B = 2, then the value of algebraic formula 3 (a-b) 2 + 2b-2a is______ .
- 4. It is known that a = A & # 178; - 2b + π / 2, B = B & # 178; - 2C + π / 2, C = C & # 178; - 2A + π / 2, where a, B and C are real numbers, Verification: at least one of a, B and C is positive
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- 7. Factorization 3A ^ 3b-12ab ^ 3 + 9A ^ 4B ^ 2-36a ^ 2B ^ 4
- 8. Given a-2a + 4B + 4B + 2 = 0, the value of a + B is
- 9. Given a 2 + B 2 + 2a-4b + 5 = 0, find the value of 2A 2 + 4b-3
- 10. There are some coal, a alone transport six days to complete, B alone transport five days to complete, now a transport three times, B transport two times, a total of 18 tons, the original total of how many tons?
- 11. Given that x, y ∈ R, try to compare the size of X & # 178; + Y & # 178; + 1 and XY + X
- 12. (- 2A) times a - (- 2A) square
- 13. The second problem is as follows: a (a-b) - B (a + b) =?
- 14. The square of (2a + b) multiplied by the square of (2a-b)
- 15. (- 2A) square by (a-b-ab)=
- 16. What is the square of [(2a + b) - the square of B] / (- 2A) equal to?
- 17. Given a = {a, B, 2} B = {2a, the square of B, 2} and satisfying a = B, find the value of a, B
- 18. Known: a + B = 2A, B = 1. Find the value of a square + b square, (a-b) square
- 19. Given a = {a, B, 2}, B = {2a, b square, 2}, and satisfying a = B, find the value of a and B
- 20. If a = - 2, a + B + C = - 2.8, find the value of the square (- B-C) - 3.2a (c + b) of the algebraic formula a?