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Solve for x in the equation 3x2 - 18x+5=47.

Solve for x in the equation 3x2 - 18x+5=47.
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18 votes
Solve for x in the equation 3x2 - 18x+5=47.

Solve for x in the equation 3x2 - 18x+5=47.-example-1
User Feroz Ahmed Ansari
by
8.2k points

1 Answer

4 votes

Answer:


x=3\pm√(23)

Explanation:

Complete the Square


3x^2-18x+5=47\\\\3x^2-18x-42=0\\\\x^2-6x-14=0\\\\x^2-6x-14+23=0+23\\\\x^2-6x+9=23\\\\(x-3)^2=23\\\\x-3=\pm√(23)\\\\x=3\pm√(23)

User Sammy Pawar
by
8.2k points
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