Question

6e7 pfvoooor pr amnh 44 pontos

Answer 1

6- a) x²-3x-4=0
x²-3x=4
-2x²=4
x²=4/2
x²=2
x=√2
x=1,4



b)5x²+4x-1=0
5x²+4x=1
9x²=1
x²=1/9
x²=0,11
x=√0,11


c)x²+8x+16=0
x²+8x=-16
9x²=-16
x²=-16/9
x²=1,77
x=√1,77

d)x²-7x+15=0
x²-7x=-15
-6x²=-15
x²=-15/6
x²=2,5
x=√2,5


e)9x²-6x+1=0
9x²-6x=-1
3x²=-1
x²=-1/3
x²=0,3
x=√0,3


f)4x²-2x+1=0
4x²-2x=-1
2x²=-1
x²=-1/2
x=√0,5