### Challenge Response 141

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We start with the following equality: -24 = -24 We write the number -24 in two different ways: 16 - 40 = 36 - 60 The numbers 16, 40, 36 and 60 can be written as follows: 4x4 - 2x4x5 = 6x6 - 2x6x5 We can add 25 on both sides of the equation without changing it: 4x4 - 2x4x5 + 5x5 = 6x6 - 2x6x5 + 5x5 Now we see that on both the left and the right side we have a squared binomial (the first squared term minus twice the product of the two terms plus the square of the second) (4 - 5) 2 = (6 - 5) 2 Eliminating the square on both sides of the equation gives: 4 - 5 = 6 - 5 Finally, by adding 5 on both sides, we get the result: 4 = 6 Obviously this demonstration has an error because we all know that 4 is not equal to 6 (or does anyone have any questions?
3.2: Graph Linear Equations in Two Variables - Mathematics
1) Read the measurement in the table and say how much it measures: kilogram hectogram decagram gram decigram centigram milligram kg hg dag g dg cg mg a 9 5, 1 2 0 6 b 0, 4 9 2 c 1 2 3 5, 5 d 1 3 2) Perform the following changes: a) 2.5 mg in gb) 9.56 dg in mg c) 0.054 hg in cg d) 54 dag in dg e) 2.45 kg in hg f) 2.6 g in kg Meet our online Measurement Converter:
Possible values ​​for x? Difficulty Level: How many possible integer values ​​of x for an integer? Challenge 27 What is the division quotient? Challenges Index Next >> Challenge 29 The Number 1234512345123451234512345
1.11: Summary
5.4E: Exercises for Section 5.4