Expressions 3

If k(x+6)= 4x2 + 20, what is k(10)=?

Correct answer:

k10 =  84

Step-by-step explanation:

k(x+6)=4x2+20 k(x)=4(x−6)2+20  k10=4⋅ (10−6)2+20=84

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