49x^2 -1 = 0
(7x )(7x ) ( +1)( -1)
(7x+1)(7x-1)=0
Check
(7x+1)(7x-1)
(7x)(7x) (7x)(-1) (1)(7x) (1)(-1)
49x^2 -7x +7x -1
49x^2 -1
Simplify:
7x+1=0
Solve:
7x+1=0
7x+1-1=0-1
7x=-1
7x/7=-1/7
x=-1/7
Simplify:
7x-1=0
Solve:
7x-1=0
7x-1+1=0+1
7x=1
7x/7=1/7
x=1/7