1) x²-x-56=0
D= 1+224= 225
x1= (1+15)/2= 8
x2= (1-15)/2= -7
2) x²-x-72=0
D= 1+288= 289
x1= (1+17)/2= 9
x2= (1-17)/2= -8
3) 2x²-x-15=0
D= 1+120= 121
x1= (1+11)/4= 3
x2= (1-11)/4= -2,5
4) 4x²+x-33=0
D= 1+528= 529
x1= (-1+23)/8= 2,75
x2= (-1-23)/8= -3
1) x²-x-56=0
D= 1+224= 225
x1= (1+15)/2= 8
x2= (1-15)/2= -7
2) x²-x-72=0
D= 1+288= 289
x1= (1+17)/2= 9
x2= (1-17)/2= -8
3) 2x²-x-15=0
D= 1+120= 121
x1= (1+11)/4= 3
x2= (1-11)/4= -2,5
4) 4x²+x-33=0
D= 1+528= 529
x1= (-1+23)/8= 2,75
x2= (-1-23)/8= -3