Объяснение:
4(x² - 6x + 9) = x² + 12x + 36
4x² - 24x + 36 - x² - 12x - 36 = 0
3x² - 36x = 0 / :3
x² - 12x = 0
x(x - 12) = 0
x₁ = 0
x - 12 = 0
x₂ = 12
4(x-3)^2=(x+6)^2
4(x^2-6x+9)=x^2+12x+36
4x^2-24x+36=x^2+12x+36
4x^2-24x-x^2-12x=36-36
3x^2-36x=0
3x(x-12)=0
x1=0
x2=12
