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How do the expressions 8+k2−6 and 8(k+2)−4k compare when k = 7?

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8+k2−6
8(k+2)−4k when k = 7.
Which is greater or are they equal ?

Answer :

79JGO

Answer:

[tex]8(k+2)-4k>8+2k-6[/tex]

Step-by-step explanation:

To figure out how they compare, we can substitute 7 into the equation:

[tex]8+(7)2-6\\8+14-6\\22-6\\16\\[/tex]

[tex]8((7)+2)-4(7)\\8(9)-28\\72-28\\44[/tex]

As you can see from the answers we got, [tex]8(k+2)-4k>8+2k-6[/tex], when [tex]k=7[/tex].

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