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If the algebraic formula x2 + kxy + Y2 is a complete square, then the value of K is
+-2
25 times the square of (x + 2) minus 36 = 0, how much is x?
The square of (X-2) - 10 (X-2) + 25 = 0
The square of (X-2) - 10 (X-2) + 25 = 0
（x-2-5)²=0
（x-7)²=0
x=7
RELATED INFORMATIONS
- 1. First three solution equation, (X-2) 2-25 = 0, which 2 is square
- 2. If the factorization result of polynomial X & sup2; - MX + 25 is (X-5) (X-7), can you determine the value of M?;
- 3. The cube of polynomial x-4x + nx-2x-5 is equal to the cube of polynomial x + 3x + MX + 4x-5
- 4. If 4x ^ 2 + 2mx + 1 is a complete square, what is the value of M
- 5. If the polynomial of x-4x ^ 3-2mx ^ 2 + 2x ^ 2-5 is a cubic trinomial, then M satisfies the condition () A.m=-1 B.m≠1 C.m=1 D.m≠1
- 6. If 4x ^ 2 + 2 (M + 3) x + 25 is a complete square, then M =?
- 7. 4X & # 178; - 12xy + K & # 178; Y & # 178; is the value of K in the complete square formula
- 8. If the solution of the equation (2x + a) / 3 = (4x + b) / 5 of X is not negative, then the ratio of a to B Is it 3 / 5? Cry for
- 9. When Xiaojun calculates the polynomial (x ^ 2 + MX + n) (x ^ 2-4x), he finds that the expansion does not contain x ^ 3 and x ^ 2. He tries to find the value of M and n
- 10. Try to explain: no matter what value x takes, the value of polynomial (2x & # 179; + 5x & # 178; + 4x-3) - (- X & # 178; + 3x & # 179; - 3x-1) + (4-7x-6x & # 178; + X & # 179;) will not change Try to explain: no matter what value x takes, the value of polynomial (2x & # 179; + 5x & # 178; + 4x-3) - (- X & # 178; + 3x & # 179; - 3x-1) + (4-7x-6x & # 178; + X & # 179;) will not change Be quick
- 11. When k is a value, x2-4xy + 4y2-10x + 20Y + K2 + 9 is a complete square expression X2: the square of X 4y2: the square of 4Y K2: the square of K
- 12. It is known that x2 + 2kx + 9 is a complete square expression, and the value of (K + 2) (K-2) (K2 + 4) can be obtained Wrong, it should be We know that X & # 178; + 2kx + 9 is a complete square, Find the value of (K + 2) (K-2) (K & # 178; + 4)
- 13. X square plus 6x plus 4 = 0
- 14. Given that the parabola y = 2x2 + 6x + m intersects the X axis at points a and B, and ab = 2, then M=______ ．
- 15. If the square of X + 2x + k is a complete square, then k =
- 16. Fill in the blanks: the root of equation (x + 1) = x + 1 is? If x square + 6x + k is a complete square expression, then the value of K is?
- 17. If the quadratic trinomial x ^ 2-6x + m ^ 2 is a complete square, then the value of M is
- 18. If the square of X + 2 (M-3) x + 49 is a complete square, M =? 3Q
- 19. 1. The minimum value of quadratic function is 1, f (1-x) = f (3 + x), f (0) = f (2) to find f (x) 2. Y = x & # 178; - 2aX + 1 is an increasing function on [0,1], and the range of a is obtained
- 20. Let the quadratic function f (x) = x ^ 2 + BX + C satisfy f (1) = - 4, f (2) = - 3,5 * f (4), and find the minimum value of this function