5.6 + 2x = 11.6-3x, find X

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• 1. 3 + 2 (3x-5) = 2x + 3 of x-3
• 2. 2y^2=5 3x^2=6 9a^2=16 2x^2-25=0 x^2+8x+16=3 x^2-2x+1=4 solve equations
• 3. Given that sin α = - 513 and α is the third quadrant angle, the values of cos α and Tan α are obtained
• 4. Given a point P (x, 3) (x ≠ 0) on the terminal edge of angle θ, and cos θ = √ 10 / 10 times x, the values of sin θ and Tan θ are obtained Please explain the difficulties when solving the problem. Thank you
• 5. Given that the sum of the two of the quadratic equations AXX + BX + C = 0 is p, the sum of the squares of the two is Q, and the sum of the cubes of the two is r, find the value of Ar + BQ + CP It's a topic in the eighth grade summer exercise book Thank you!
• 6. It is known that the sum of the two parts of the equation AX & sup2; + BX + C = 0 (a ≠ 0) is p, the sum of the squares of the two parts is Q, and the sum of the cubes of the two parts is r Write all the steps!
• 7. If the ratio of ax ^ 2 + BX + C = 0 (a is not equal to 0) is 2:3, then the relationship among a, B and C is Why?
• 8. Let X1 and X2 be two real roots of the quadratic equation x & sup2; + x = n-2 = MX with respect to x, and let X12 B.M > 1, n Is X & sup2; + X + n-2 = MX
• 9. Find the tangent equation parallel to the straight line y = 2x on the curve y = x & #
• 10. If the curve represented by the equation AX & # 178; - XY + Y & # 178; = 4 passes through the point (2,16), then a=
• 11. 3x^2-1-2x-5+3x-x^2
• 12. The solution of the system of equations 2x − y = 53x + 4Y = 2 is______ ．
• 13. The first column has six numbers, the second column has seven numbers, the third column has two numbers, the fourth column has four numbers, and the fifth column has three numbers. How many combinations can there be First column second column third column fourth column fifth column 1 1 1 1 1 2 2 2 2 2 3 3 3 3 4 4 4 5 5 6 6 seven How many of them are combined into 1111167243? Who knows
• 14. It is known that the elements in the first row of the fourth-order determinant D are 1,2,0, - 4 respectively, and the remainder of the third row is 6, x, 19, 2 in turn. Try to find the root of X
• 15. Calculating determinant 3 - 5 - 22 - 47 4 4 - 9 - 37 2 - 6 - 32 Four orders, four numbers in a row, just like the one on the first floor
• 16. Consult determinant calculation 0 12 4 1 20 1 3 - 1 35 2 6 3 4 3 3 5 0 Consult determinant calculation 0 1 2 4 1 2 0 1 1 3 -1 3 5 2 6 3 4 3 5 0 1 1 1 6 6
• 17. Big one determinant calculation problem! D= 1 1 1 1 a b c d a^2 b^2 c^2 d^2 a^4 b^4 c^4 d^4 The answer to this question is (a-b) (A-C) (A-D) (B-C) (B-D) (C-D) (a + B + C + D) If we want to use Vandermonde determinant in this problem! Why is there still no answer!
• 18. F (x) = determinant first line x 1 2 3 second line 3 x 1 2 third line 2 3 x 1 fourth line 1 2 3 x find f (4), please explain it in detail
• 19. The first line of the determinant 123 n. The second line 234 N-1,1 the third line 345 ^ 1,2 the nth line is n, 1,2,3 How do n-1 calculate this determinant
• 20. Expand the determinant according to the third column and calculate its value: the first row 1234, the second row 2341, the third row 3412, the fourth row 4123