Question

va rog mult ecuatia de gradul doi x²-5x+4=0 ;x²-0x+8=0 ;2x²-9x+7=0 ;x²-6x+5=0 ;x²-2x+1=0 ;2x²+5x+2=0 va rog mult dau coroana

Answer 1

x²-5x+4=0
(x-4)(x-1) = 0
x = 4 or x = 1

2x^2 - 9x + 7 = 0
 2(x - 7/2)(x - 1)=0
x=7/2 , x=1

x^2 - 6x + 5 = 0
(x - 5)(x - 1)=0
x=5, x=1

x^2 - 2x + 1 = 0
(x - 1)^2=0
x=1

2x^2 + 5x + 2 = 0
 2(x + 2)(x + 1/2)=0
x=-2, x=-1/2