Question

solve by completing the square:
x^2-2x=15

Answer 1

please show work

Answer 2

x^2-2x=15
x^2-2x-15=0
(x-1)^2 (-1)-15=0
(x-1)^2-16=0
(x-1)^2=16
x-1=+-4
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x-1=4
x=5
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x-1=-4
x=-3

Answer 3

(1) (1/2b)^2 =c1
given that b= -2, for the value of c1=[1/2(2)]2=1

following the formula a^2+bx+c1=c-c1

x^2-2x+1=15+1; given that c1 is positive. .

x^2-2x+1=16
x^2-2x-15=0,

i use the completing the square method, but i think there's no need for doing it, for there is already a given constant on the right side of the equation. . that's why my solution is the same with sam...