3.8 is a fraction and so cannot be put in the form of the product of two integers.
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The factor of ab refers to the numbers or variables that can be multiplied to produce the term ab. In this case, the factors of ab are a and b. Factors are numbers or variables that can divide into a term without leaving a remainder. Therefore, the factors of ab are a and b because they can be multiplied together to result in the term ab.
Here is a proof. Let a and b be any two real numbers. Consider the number x defined as x = ab + (-a)(b) + (-a)(-b). We can write this out differently as x = ab + (-a)[ (b) + (-b) ] Then, by factoring out -a , we find that x= ab + (-a)(0) = ab + 0 = ab. Also, x = [ a + (-a) ]b + (-a)(-b) And by factoring out b, we find that x=0 * b + (-a)(-b) = 0 + (-a)(-b) = (-a)(-b). Therefore x = ab and x = (-a)(-b) Then, by the transitivity of equality, we have ab = (-a)(-b).
Reciprocals. Example (a/b)(b/a)=(ab/ab)=1
a3 + b3 = (a + b)(a2 - ab + b2) a3 - b3 = (a - b)(a2 + ab + b2
The GCF is b.