How to solve X & # 178; - 16x-161 = 0?

RELATED INFORMATIONS

• 1. 100（1＋x）²＝121
• 2. (x + 1) ² = 4 to find the value of X
• 3. Solving equations {(X-2) (y + 3) = (x + 1) (Y-1) {(x + 1) (y + 1) = (x-1) (y + 5)
• 4. 100.2 × 99.8 how many steps is it necessary to calculate with the square difference
• 5. Square difference calculation 1、10.3*9.7 2. 1 and 3 / 13 * 10 / 13 How about this?
• 6. 2x²-8=0 （x-2）²-x+2=0 (x-3)²+2x(x-3)=0 (x-2)²=2x-4 (2x-1)²=x²-4 Solving quadratic equation with one variable by factorization
• 7. Given f (x) = x & # 178; + 4x + 3, find the minimum g (T) and maximum H (T) of F (x) in the interval [T, t + 1] There is another problem, how to get ± 2.5 I'm so confused. I don't understand.
• 8. If f (x-1) = 2x & # 178; + 1, find the analytic expression of F (x)
• 9. How to understand the substitution method in high school function, for example
• 10. Function substitution method problem! Do not understand: F (x + 1) = x & # 178; + 3 find f (x) substitution, use t = x + 1, and finally write t back to x, then Why can't we replace x + 1 with X first?
• 11. x²-2x＜7 It's a process!
• 12. When m is a value, the equation (m-2) x-mx + 2 = M-X is a quadratic equation of one variable about x? Write its quadratic term, coefficient of first term and constant term
• 13. We know the quadratic equation of one variable about X (1): x2 + 2x + 2-m = 0. (1) if the equation has two unequal real roots, find the value range of real number m; (2) please use the conclusion of (1) to substitute any value of m into equation (1), and use the matching method to find the two real roots of the equation
• 14. There is a quadratic equation of one variable about X, the sum of the coefficient of quadratic term and constant term is 7, and the coefficient of the first term is 3 less than that of the second term
• 15. A problem of quadratic equation of one variable Inequality ax ^ 2 + ax-4
• 16. In order to strengthen the macro management of the production and marketing of cigarettes, the state imposes a surtax policy on the sales of cigarettes. Now we know that the market price of a certain brand of cigarettes is 70 yuan. If there is no surtax, the annual production and sales of 1 million cigarettes will be reduced by 10 million cigarettes per year. If the state imposes a surtax and taxes x yuan per 100 yuan (called tax rate X%), the annual production and sales will be reduced by 10 million cigarettes The additional tax is 1.68 million yuan, and the production and sales of cigarettes are under macro control. The annual sales of cigarettes are no more than 500000. What is the tax rate?
• 17. 1000 (1 + x) & sup2; = 1210 to solve the quadratic equation of one variable, using the direct flattening method
• 18. (16x-13)/(4x-3)-(20x-24)/(4x-5)=(32x-30)/(8x-7)-(40x-43)/(8x-9) Find x
• 19. 4x^n+2-9x^n+6x^n-1-x^n-2 4X ^ (n + 2) - 9x ^ n + 6x ^ (n-1) - x ^ (n-2), n is an integer and greater than 2
• 20. If 4x-5y = 0, the value of 15y-12x-7 is () a.0 B. - 7 C. - 4 d.7