*pls help* solve 7,8,9, and 10 for brainliest
1 answer:
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Can't factor
use quadratic
for
ax^2+bx+c=0
x=
given
1x^2-4x+85=0
a=1
b=-4
c=85
x=
x=
x=
x=
remember that √-1=i
x=
x=
x=2+/-9i
x=2+9i or x=2-9i
use quadratic
for
ax^2+bx+c=0
x=
given
1x^2-4x+85=0
a=1
b=-4
c=85
x=
x=
x=
x=
remember that √-1=i
x=
x=
x=2+/-9i
x=2+9i or x=2-9i
