Question

решите уравнение (х+8)^2=(х+3)^2

Answer 1

(x + 8 - (x + 3)) * (x + 8 + x + 3)=  0
(x + 8 - x - 3) *(2x + 11) = 0 
5*(2x+  11) = 0 
2x + 11 = 0 
2x = - 11
x = - 5,5 

Answer 2

x²+16x+64=x²+6x+9
16x-6x=9-64
10x=-55
x=-55/10=-5,5