A two digit number is equal to three times of the product of the numbers on each digit. The number on the tenth digit is 2 less than the number on the single digit. How many are the two digits? Use the 2-ary equation

If the ten digit is a, the single digit is a + 2,
So there are:
10a+(a+2)=3a(a+2)
3a^2-5a-2=0
(3a+1)(a-2)=0
therefore
A = 2 or a = - 1 / 3
So, this number is 24

RELATED INFORMATIONS

1. In daily life, such as withdrawal and Internet access, passwords are needed. There is a kind of password generated by "factoring" method, which is convenient for memory. The principle is: for example In daily life, such as withdrawing money and surfing the Internet, we need a password. There is a kind of password generated by factorization, which is convenient for memory. The principle is: for polynomial x4-y4, the result of factorization is (X-Y) (x + y) (x2 + Y2). If x = 9, y = 9, then the values of each factor are: X-Y = 0, x + y = 18, X2 + y2 = 162, so "018162" can be used as a six digit password, When x = 10 and y = 10, the password generated by the above method is:______ Just write one
2. 1 / 2 (5x + 7 / 3) = 1 / 3 (6x-2 / 5) - 1 / 6 (x + 4) to solve the equation, I calculate - 8, right? Please say the reason for 8. Thank you. The correct answer is - 4. You have to go to the denominator first. The question is wrong. It's not 2 / 5, it's 5 / 2. The answer is - 4
3. Through the point B (2,1), make a straight line L intersection hyperbola x square - y square / 2 = 1 at two points a and B, and M is the midpoint of AB, find the equation of straight line L
4. The mechanical efficiency of elevator a is higher than that of elevator B. they respectively lift objects of the same mass to the same height at a constant speed A. A lift does less total work B. B lift does less total work c. a lift does less useful work D. B lift does more useful work
5. If a and B are real numbers and (5a + 6) ^ + | B-3 | = 0, then_ a_ B ^ represents that 2 is the square of... And the last is the value of a divided by B
6. The passenger ships and cargo ships set out from Wuhan and Shanghai at the same time. The cargo ships travel 40 kilometers per hour. The speed of the passenger ships is 1.2 times that of the cargo ships. The distance between the two places is 862.4 kilometers. How many hours can the two ships meet?
7. How to calculate: 2 + 4 + 6 + 8 + 10 + ＋96＋98
8. 2 + 4 + 6 + 8 + 10 +. + 96 + 98 + 100 is calculated by drag type
9. 2 + 4 + 6 + 8 + 10. + 96 + 98 (ingenious calculation)
10. Ingenious calculation 2 + 4 + 6 + 8 + 10 + '+ 96 + 98
11. It is known that the quadratic function f (x) is an increasing function in the domain of definition (0, ∞), and f (XY) = f (x) + F (y). F (2) = 1 1 to prove f (8) = 3
12. If f (x) satisfies 2F (x) + F (- x) = 5x + 4, find f (x) and f (- x)
13. If the distance between point P and X axis is 4 and P (3, x), then x = ()
14. Factorization (2 - √ 5) ^ 2009 (√ 5 + 2) ^ 2010
15. It is proved that the value of the determinant of a real symmetric matrix is equal to the product of its eigenvalues?
16. The equation of one variable and one degree 3-4x=2-x 0.2x+1=-1.8x 3/1x=9-3/2x
17. 2 / 3 + 4 - (2 / 3 + 5 / 7) simple calculation
18. If X & sup2; - 4Y & sup2; = - 15,2y-x = 3, then x + 2Y=______ . ..
19. The second power of (- 5 / 8) x (- 4) - 0.25x (- 5) x (- 4)
20. Find the unknown x (12%) (1) 3:8 = x: 2.4 (2) x: 5 =: 0.5 (3): x = 6