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nekit [7.7K]
3 years ago
12

Complete the square y=x^2+6x+8

Mathematics
1 answer:
andreyandreev [35.5K]3 years ago
8 0

Answer:

y = (x+3)² - 1

Step-by-step explanation:

To complete the square take the middle term b and divide by 2. Then square the value.

Here b = 6.

So 6/2 = 3

3² = 9

Add 9 to both sides of the equation.

x² + 6x + 8 = 0

x² + 6x + 9 + 8 = 9

(x+3)² - 1 = y

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Could someone help me for this?
lina2011 [118]

Answer:

x = - \frac{5}{3} , x = \frac{5}{2}

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to find the points of intersection equate the 2 equations , that is

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product = 6 × - 25 = - 150 and sum = - 5

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3x(2x - 5) + 5(2x - 5) = 0 ← factor out (2x - 5) from each term

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equate each factor to zero and solve for x

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