Answer:
(a) 6/x², or StartFraction 6 Over x squared EndFraction
Step-by-step explanation:
You want the sum of fractions ...
[tex]\dfrac{2}{x^2}+\dfrac{4}{x^2}[/tex]
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As with numerical fractions, they can be added if they have the same denominator. Here, both fractions have the same denominator, so their sum will be the sum of the numerators over that denominator:
[tex]\dfrac{2}{x^2}+\dfrac{4}{x^2} = \dfrac{2+4}{x^2}=\boxed{\dfrac{6}{x^2}}[/tex]
