x2+5x-14=0 14-5x-x2=0
(x+7) (x-2)=0 (7-x) (2-x)=0
x+7=0 x-2=0 7-x=0 2-x=0
x+7-7=0-7 x-2+2=0+2 7-x-7=0 -7 2-x-2=0-2
x=-7 x=2 x=-7 x=-2
check: check:
(-7)2+5(-7)-14=0 (2)2+5(2)-14=0 14-5(-7)--(7)2=0 14-5(-2)-(-2)2=0
49-35-14=0 4+10-14=0 14-35-49=0 14-10+4=0
0=0 0=0 0=0 0=0
they have the same solution
