Question

Type the correct answer in the box.

Answer 1

Answer:

$\displaystyle y = [x + 4]^2 - 54 \\ \\ -38 = c; 8 = b; 1 = a$

Step-by-step explanation:

$\displaystyle x^2 + 8x = 38 → x^2 + 8x - 38; -38 = c; 8 = b; 1 = a \\ \\ x^2 + 8x - 38 \\ [x^2 + 8x + 16] + k \\ [x^2 + 8x + 16] - 54 \\ \\ [x + 4]^2 - 54$

Again, use $\displaystyle [\frac{b}{2}]^2$for completing the square.

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