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Complete the square for 5x^2 – 30x = 5.

A. (x – 3)^2 = 10
B. (x + 3)^2 = 10
C. (5x – 3)^2 = 14
D. (5x – 3)^2 = 8

Respuesta :

Mathunga
First, subtract 5 from both sides, leaving you with 5[tex] x^{2} [/tex] - 30x - 5 = 0
If you use the quadratic formula (a=5), (b=-30), (c=-5)

x=-b +/- √b²-4ac / 2a

x= -(30) +/- √(30)² - 4(5) * (-5) / 2(5)

x= 30 +/- √1000 / 10

x = 3 +/- √10

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