Question

Solve the question : x^2+17x-51=0

Answer 1

Answer:

square root method

x^2+17x-51=0

x^2+17x=51

x^2+17x+(17/2)^2= 51+(17/2)^2

(x+17/2)^2 = 51 + 289/4

(x+17/2)^2 = 493/4

(x+17/2) =  22.20/2

x= 22.20/2- 17/2  or     x=-22.20/2-17/2

x= 5.20/2                      x= -39.2

x= 2.60                         x= -19.6