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kari74 [83]
3 years ago
12

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

Mathematics
1 answer:
MrRissso [65]3 years ago
7 0

Answer:

x=3\pm\sqrt{23}

Step-by-step explanation:

<u>Complete the Square</u>

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\sqrt{23}\\\\x=3\pm\sqrt{23}

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