Question

(x + 5)(x –5)= 39
Please Solve The Equation By Applying Quadratic Formula..​

Answer 1

(X+5)(X-5)=39

X^2 - 25= 39

X^2 = 16

X=4 or -4

Answer 2

(x+5)(x-5)=39

x^2+5x-5x-25=39

x^2-25=39

x^2=64

x=8

by quadratic formula

x^2-25=39

x^2-64=0

b^2-4ac=0

b=0,a=1,c=-64

0-4*1*-64=256

D=-b-+(b^2-4ac)^1/2/2a

D=0+(256)^1/2

D=16/2

D=8

8 is your answer

hopes helps you dearr mate