K(x)=-4(x+3)2+9

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Solution for K(x)=-4(x+3)2+9 equation: 



(K)=-4(K+3)2+9

We move all terms to the left:

(K)-(-4(K+3)2+9)=0



We calculate terms in parentheses: -(-4(K+3)2+9), so:

-4(K+3)2+9

We multiply parentheses

-8K-24+9

We add all the numbers together, and all the variables

-8K-15

Back to the equation:

-(-8K-15)



We get rid of parentheses

K+8K+15=0

We add all the numbers together, and all the variables

9K+15=0

We move all terms containing K to the left, all other terms to the right

9K=-15

K=-15/9

K=-1+2/3

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