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SOLUTION: Solve the equation by completing the square. a. Write irrational numbers in simplest radical form. b. Describe each step as you go. X^2 + 4x – 8 = 0
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-> SOLUTION: Solve the equation by completing the square. a. Write irrational numbers in simplest radical form. b. Describe each step as you go. X^2 + 4x – 8 = 0
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Question 456739
:
Solve the equation by completing the square.
a. Write irrational numbers in simplest radical form.
b. Describe each step as you go.
X^2 + 4x – 8 = 0
Answer by
stanbon(69061)
(
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):
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put this solution on YOUR website!
X^2 + 4x – 8 = 0
----
x^2 + 4x + ? = 8 + ?
----
x^2 + 4x + 4 = 8 + 4
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(x+2)^2 = 12
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x+2 = +/-2sqrt(3)
------
x = -2+2sqrt(3) or x = -2-2sqrt(3)
=======================================
Cheers,
Stan H.
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