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kolbaska11 [484]
3 years ago
15

Solve x2 + 8x + 8 = 0 by completing the square. Which equation is used in the process?

Mathematics
2 answers:
garri49 [273]3 years ago
6 0

x² + 8x + 8 = 0

x² + 8x + 8 + 8 = 0 + 8

x² + 8x + 16 = 8

x² + 4x + 4x + 16 = 8

x(x) + x(4) + 4(x) + 4(4) = 8

x(x + 4) + 4(x + 4) = 8

(x + 4)(x + 4) = 8

(x + 4)² = 8

Dominik [7]3 years ago
5 0

Step-by-step explanation:

the answer is -1.18 or - 13.65

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When you have this type of problem, you need to combine the like-terms and isolate the variable.

3x + 122 = 22x - 11

Add 11 to both sides to get rid of it

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Then you would bring the 3x to the other side, so subtract 3x from both sides

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133 = 22x - 3x

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Then divide both sides by 19 to isolate x

133/19 = 19x/19

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