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TiliK225 [7]
3 years ago
13

Pls help

Mathematics
2 answers:
sweet [91]3 years ago
7 0

Answer:

B

Step-by-step explanation:

Given

x² + 2x + 8 ( to find the solutions equate to zero )

x² + 2x + 8 = 0 ( subtract 8 from both sides )

x² + 2x = - 8

To solve we can use the method of completing the square

add ( half the coefficient of the x- term )² to both sides

x² + 2(1)x + 1 = - 8 + 1

(x + 1)² = - 7 ( take the square root of both sides )

x + 1 = ± \sqrt{-7} = ± i \sqrt{7}

Subtract 1 from both sides )

x = - 1 ± i \sqrt{7}

astra-53 [7]3 years ago
4 0

Answer:

2+i times the square root of 7

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