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dmitriy555 [2]
3 years ago
13

40 Points? Solve & Explain

Mathematics
2 answers:
vazorg [7]3 years ago
7 0

Answer:

(-1, 17)

Step-by-step explanation:

Ymorist [56]3 years ago
5 0

Answer:

<h2>(-1, 17)</h2>

Step-by-step explanation:

The vertex form of a quadratic equation:

y=a(x-h)^2+k

<em>(h, k)</em> - vertex

y=x^2+2x+18

y=x^2+2(x)(1)+1^2-1^2+18     <em>use (a + b)² = a² + 2ab + b²   </em><em>(*)</em>

y=\underbrace{x^2+2(x)(1)+1^2}_{(*)}-1+18

y=(x+1)^2+17\\\\y=(x-(-1))^2+17

<em>h = -1, k = 17</em>

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