Question

z²-5 root 2z+12
please answer​

Answer 1

Answer:

z^2 - 5√2 z - 12 = 0

z^2 + √2z - 6√2z - 12 = 0

z ( z + √2 ) - 6√2 ( z + √2) = 0

( z + √2) ( z - 6√2) = 0

z+√2 = 0

z = -√2

z - 6√2 = 0

z = 6√2