1) x1=-3 x2=3
2)x1=-8 x2=8
3)x1=-√7. x2=√7
4)x1=-√71 x2=√71
5)x1=-7/9. x2=7/9
2x⁴+5x²-3=0
2x²+6x-x-3=0
(x+3)•(2x-1)=0
x+3=0
2x-1=0
x²=-3
x²=1/2
x=-√2/2
x=√2/2
5x⁴-3x²-2=0
2x²+5x-2
x²=-5+√41/4
x²=5+√41/4
x=-√-5+√41/2
x=√-5+√41/2
