Question

solve by quadratic formula
1) z²-32z-105=0
2) 40+3x-x²=0

Answer 1

Answer:

For second part

X=-5,2

Step-by-step explanation:

-3+- under root (9-(-40))/2=(-3+7)/2 ,(-3-7)/2=4/2 , -10/2=2,-5

Answer 2

1 z²-32z-105=0 z²-32z=105

z²=150-32z z²=118-z Z²/z=118 z=118