If x = 2, why is the inverse proposition of square - 3x + 2 = 0 false? Please give me a counterexample!

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• 1. If x = 2, then the inverse proposition of x square - 5, x + 6 = 0 is no proposition, the inverse proposition is no proposition and the truth is judged
• 2. If y = x + 1, then y = 3 and x = 2. Find the truth of this proposition and its inverse proposition, no proposition, inverse proposition, x y belongs to Z Last time I asked a question. I'm sorry
• 3. The inverse proposition of the proposition "if xy = 1, then x and y are reciprocal to each other" is______ ．
• 4. Write the inverse proposition of "if xy = 6, then x = 3 and y = 2", no proposition, inverse no proposition rt And judge right and wrong
• 5. For positive numbers x and y, there are the following propositions: x + y = 2, then √ XY ≤ 1, if x + y = 3. Then √ XY ≤ three thirds, if x + y = 6, then √ XY ≤ 3 According to the above three propositions conjecture: 1 if x + y = 9, then √ XY ≤____ For any positive number a, B, there is always √ ab ≤____
• 6. If the absolute value of negative x is equal to one sixth, then one sixth of x =?
• 7. If the absolute value of a is equal to four-thirds, can you compare the size of a, negative a, one-third of a, one-third of a?
• 8. If the fourth power of (x + 2) and the absolute value of 4-y are opposite to each other, then what is the Y power of X?
• 9. If x and y are opposite to each other, then | x + 2011 + y|=______ ．
• 10. It is known that a and D are opposite to each other, C and D are reciprocal to each other, and the absolute value of X is equal to 2. Try to find X3 ten (a + B ten CD) X-1 (a + b) It is known that a and D are opposite to each other, C and D are reciprocal to each other, and the absolute value of X is equal to 2 X3 ten (a + B ten CD) x one (a ten b) 2012 ten (one CD) 2011
• 11. If proposition x = 3, then x ^ 2-7x + 12 = 0 and the number of its inverse proposition, no proposition, inverse no proposition and false proposition?
• 12. Write out the inverse proposition, no proposition and inverse no proposition of the proposition (if x square + y square = 0, then x = 0 and y = 0), and judge the truth
• 13. If x − 2 + (y + 1) 2 = 0, then x = 2 and y = 1, the inverse proposition, the negative proposition and the inverse negative proposition are written, and their true and false are judged
• 14. In the rectangular coordinate system, the inverse proposition of point (x, y) and point (negative x, negative y) about the origin symmetry, and judge the truth of the original proposition and the inverse proposition
• 15. Write the proposition "if (radical X-2) + (y + 1) ^ 2 = 0", then x = 2 and y = - 1 inverse proposition, no proposition, inverse no proposition, and judge their true and false
• 16. Is the sum of two positive numbers always greater than each addend?
• 17. The inverse proposition of positive number greater than negative number is
• 18. Two numbers add to get a positive number. What are these two numbers A. There is at least one positive number B. There is at least one negative number C. Both are negative numbers D. Both are positive numbers
• 19. The absolute value of two opposite numbers (), on the contrary, the absolute value of two equal numbers () or ()
• 20. If the absolute values of two opposite numbers are equal, then the two numbers with equal absolute values are opposite to each other______ (fill in "correct" or "wrong")