x^2- 4x-96 = 0
x= 2+- √4+96
x= 2+-10
x= -8
x= 12
x^2- 4x-96= (x-12) (x+ 8)
5x2+2x-3 = 0
1+- √1+15
x= ---------------------------
5
1+- 4
x= ----------------
5
x= 1
x= -3/ 5
5x2+2x-3 = 5 (х-1) (х+ 3/5) = (х-1) (5х+3)
(√11-1)^2= √11^2-1^2=11-1=10
дополните :
5x-7=2x+1 =_x=_
5x-7=2x+1
3х = 6
х=2