Question

solve:

x^2-4x+85=0

a. {3+7i,3-7i}
b. {2+9i,2-9i}
c. {2+19i,2-19i}
d. {7+3i,7-3i} solve:

x^2-4x+85=0

a. {3+7i,3-7i}
b. {2+9i,2-9i}
c. {2+19i,2-19i}
d. {7+3i,7-3i} @Mathematics

Answer 1

B

Answer 2

+4+or-UNDERROOT OF -324/2*1 this give ANSWER B

Answer 3

\[ \{x\to 2-9 i\},\{x\to 2+9 i\}\} \]