Answer:
5z²-34z-7=0
b²-4ac =(-34)²-4(5*-7)=1296
Δ=1296
(-b-√Δ)/2a=(34-36)/10=-2/10=-1/5
(-b+√Δ)/2a=(34+36)/10=7
Solution 1 :-1/5
Solution 2 : 7
Explanation:
9.5m questions
12.2m answers