Seeking three eight mathematical problems urgently

3x²-4xy-2y²=5x²-2(x²+2xy+y²)=5x²-2(x+y)²=(√5x)²-[√2(x+y)]²=[√5x+√2(x+y)][√5x-√2(x+y)]=[(√5+√2)x+√2y][(√5-√2)x-√2y] 2a²-3ab-b²=2[a...

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1. Factorization of mathematical problems （a+1）×（a+2)×（a+3)×（a+4）+1
2. Calculation: 39 × 37-13 × 34=______ ．
3. What is the solution of X & # 178; - 3x + 18 = 0,
4. It is known that the set a = {x | X & # 178; + 3x-18 > 0}, B = {x | X & # 178; - (2k + 1) x + K (K + 1) ≤ 0, And a ∩ B ≠ &;, then the value range of real number k is——
5. (3x²-2x-1)÷（x-1)=（
6. (- 4x) (2x & # 178; + 3x-1) to specific process
7. Find the maximum value of the following format: (1) y = 2x & # 178; + 8x + 9 (2) y = - 2x & # 178; + 3x + 7
8. 1.x²+4/3x+______ =(x+____ )² 2. Given (A & # 178; + B & # 178;), # 178; - (A & # 178; + B & # 178;) - 6 = 0, then a & # 178; + B & # 178=____ 3. The equations are solved by formula method and collocation method: 2x & # 178; - 3x = 2, 2x-y & # 178; + 6y-11 = 0, x-2y-1 = 0
9. (3x-1)²=4(x+1)²
10. It is known that (M & # 178; - 1) x & # 178; - MX + 8 = 0 is a one variable linear equation about X. find the value of formula 199 (M + x) (x-2m) + 22m
11. Factorization problem 3x ^ 4 + 6x ^ 2-9
12. Quick answer in 5 minutes` x@-3x-4 = (x-4)(x+1) The above factor is determined by x@-3x-4 How to evolve into (x-4) (x + 1) and what formula to use in it`` …… [@ for square]
13. ① 16m ^ - n ^ 4 ② 16 (a-b) & # - 178; - 9 (a + b) & # - 178; ③ x ^ 5y-xy ④ 2012 & # - 178; - 2011 & # - 178; ⑤ 429 & # - 178; × 2-171 & # - 178; × 2 ⑥ 1000 & # / 252 & # - 178; - 248 & # - 178; ⑦ (50 and 1 / 11) & # - 178; - (49 and 10 / 11) & # - 178;
14. Who can work out some factorization problems in grade one of junior high school
15. Several factorization problems in grade one of junior high school 1.（x-y)²+4xy 2.(x-1)(x-2)-2(2-x)² 3.(a²+ab+b²)²-9a²b²
16. 1. Factorization: (2 times of X + 2x) (2 times of X + 2x-2) - 3 2. If a and B are integers, and the degree 2-x-1 of X is a factor of the degree 3 of AX + the degree 2 + 1 of BX, find the value of B 3. Find the minimum value of the second power of 4x - x + 3 Quick return,
17. There are questions about factorization in grade one of junior high school （1）a²+（2b-3）a+b²-3b+2 (2) 9 to the power of N - 3 to the power of (n + 2) - 10 Like [the fourth power of X - 3 times the square of X + 1] （1）a²+（2b-3）× a+b²-3b+2
18. Known: x square - x = 1, y square - y = 1 and X ≠ y, find x square + 2XY + y square Find the digital value of x square + 2XY + y square
19. (1) The square of X - some square - x + 1 / 4 (2) The fourth power of X is the square of - 2x and the square of Y + 1 (3) Square of (x + y) - 4 (x + Y-1) (4) The square of 4x - the square of 6xy + 9y (5) The square of X + the square of 2XY + - y
20. x²-4xy-1+4y²= 7.77²+4.46×7.77+2.23²= There must be a process. Let's go, brothers