Question

solve the equation by quadratic formula :- z^2+2z-25=0

Answer 1

hope it's helpful for you

Answer 2

z²+2z-25= 0

a= 1

b= 2

c= -25

z=( - b ±√ D)/2a......(1)

D= b²-4ac
= 4-(4)(1)(-25)= 4+100= 104

find the z

z= -2±√104/2

z=[ -2±(2√26)]/2

z= -1±√26

z= -1+√26 or z= -1-√26