Question

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

Answer 1

B. X=+3 by completing the square

Answer 2

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)`