Question

Решите уравнение (х+4)^2=4х^2+5

Answer 1

(x+4)^2=4x^2+5
x^2+8x+16=4x^2+5
3x^2-8x-11=0
D=(-8)^2-4*3*(-11)=196
x1=(8-14)/6=-1
x2=(8+14)/6=11/3