Find the zeros of y = x2 - 8x - 3 by completing the square. O A. x=3+√7 B. X = +3 C. X = 4 + 119 O D. X= -4 + 119

asked Mar 6, 2021 214k views

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Find the zeros of y = x2 - 8x - 3 by completing the square.

O A. x=3+√7
B. X = +3
C. X = 4 + 119
O D. X= -4 + 119

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4 votes

B. X=+3 by completing the square

Sashi Kolli answered Mar 9, 2021

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5 votes

Answer:

Assuming that you meant 4+√19 is C.

Explanation:

$x^2-8x-3=x^2-2(4)x-3=x^2-2(4)x+16-3-16\\(x-4)^2-19\\(x-4)^2-19=0\\(x+4)^2=19\\x+4=√(19) \\x=-4+-√(19)$

Gramowski answered Mar 12, 2021

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