x-5 |
x+5 |
x-5 |
x+5 |
x2-5 |
x2+5 |
x1-5 |
x1+5 |
(x1+5)(x2-5)-(x2+5)(x1-5) |
(x2+5)(x1+5) |
10( x2-x1) |
(x2+5)(x1+5) |
10(x2-x1) |
(x2+5)(x1+5) |
{ | a(x-3)=
x>3 x<-5或x>5 |
x-5 |
(x+5)(x-3) |
x-5 |
(x+5)(x-3) |
-x2+10x-5 |
(x+5) 2(x-3) 2 |
-[x-(5-2 √5 )][x-(5+2√5 )] |
(x+5)(x-3) |
x-5 |
(x+5)(x-3) |
x-5 |
(x+5)(x-3) |
3- √5 |
16 |
x-5 |
(x+5)(x-3) |
3- √5 |
16 |
3- √5 |
16 |