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

Abdulrahman Bres asked May 18, 2023

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7 votes

Abdulrahman Bres asked May 18, 2023

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10 votes

Answer:

$x=3\pm√(23)$

Explanation:

Complete the Square

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

Vickel answered May 24, 2023

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