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The mistake that Anja made during the simplification of the considered expression is given by: Option C: She subtracted the coefficients instead of dividing them
<h3>What are coefficients?</h3>Constants who are in multiplication with variables are called coefficients of those variables.
For example, in we have 10 as coefficient of
Those variables who have got no visible coefficient has 1 as their coefficient. Thus, has got its coefficient as 1. It is true since 1 multiplied with any number is that number itself.(
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If we have then 'a' is called base and 'b' is called power or exponent and we call it "a is raised to the power b" (this statement might change from text to text slightly).
Exponentiation(the process of raising some number to some power) have some basic rules as:
For the considered situation, the expression that Anja is simplifying is:
Anja simplified it to
She performed operations with variable 'x' correctly since
But coefficients will also get divided. Instead of dividing 10 by -5, she subtracted them (as 10 - (-5) = 10 + 5 = 15)
This was her mistake.
The correct simplification would be:
Thus, the mistake that Anja made during the simplification of the considered expression is given by: Option C: She subtracted the coefficients instead of dividing them
Learn more about exponent and bases here: