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lidiya [134]
2 years ago
15

Use completing the square to solve x^2+6x=13

Mathematics
1 answer:
lara [203]2 years ago
8 0

Answer:

x = -3 +/- square root(22)

Step-by-step explanation:

x = -b +/- square root(b^2 - 4ac) / 2a

ax^2 + bx + c = 0

these are both the quadratic formula but one is solved for the x and another for 0

a= 1

b= 6

c = -13

x= -6 +/- square root( 6^2 - 4(1)(13)) / 2(1)

x = -6 +/- sqrt( 36 + 52) / 2

x= -6 +/- sqrt (88) / 2

sqrt of 88 = 2 x sqrt (22)

divide 2 on each

x= -3 +/- sqrt (22)

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When the snail crawls 1/3 of a mile per day, it will take him, $1 \times \frac{3}{1} \times 3$

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When the snail crawls 1/4 of a mile per day, it will take him, $1 \times \frac{4}{1} \times 3$

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When the snail crawls 3/4 of a mile per day, it will take him, $1 \times \frac{4}{3} \times 3$

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When the snail crawls 2/3 of a mile per day, it will take him, $1 \times \frac{3}{2} \times 3$

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