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kodGreya [7K]
3 years ago
14

X^2+8x=38

Mathematics
2 answers:
Alecsey [184]3 years ago
7 0

Answer:

ans may be 3.348469228

marta [7]3 years ago
7 0

Answer:

x = -4 ± 3√6

Step-by-step explanation:

x² + 8x = 38

Complete the square by adding (8/2)² = 16 to both sides.

x² + 8x + 16 = 38 + 16

(x + 4)² = 54

x + 4 = ±√54

x = -4 ± 3√6

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If the surface area of the box of cereal is 272 inches squared, find the length of the box.
LekaFEV [45]

Answer:

x= 8 inches

Step-by-step explanation:

you left out the other lengths but since i had this same question once, the other lengths are 12 and 2-

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12 in x 2 in x ?

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and we know that there are 6 faces

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area = 272 sq. in.  = 48 + 4x + 24x

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Ainat [17]

Answer:

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