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zhuklara [117]
3 years ago
10

What is the solution of the equation x2 + 8x + 5 = 0?

Mathematics
1 answer:
Setler79 [48]3 years ago
5 0

Answer:

x = -0.683 (3dp)

x = -7.317 (3dp)

Step-by-step explanation:

<u>Step 1: Apply the quadratic formula</u>

(-b±(\sqrt{b^{2}-4ac})) / 2a

a = 1 <em>(x²)</em>

b = 8 <em>(8x)</em>

c = 5 <em>(5)</em>

(-8±(\sqrt{8^{2}-4 x 1 x 5})) / 2 x 1

<u>Step 2: Simplify</u>

(-8±(\sqrt{44})) / 2

<u>Step 3: Solve</u>

You need to replace the ± with first a + and then a -.

(-8+(\sqrt{44})) / 2 = -0.683 (3dp) = x

(-8-(\sqrt{44})) / 2 = -7.317 (3dp) = x

Hope this helps!

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