Question

(3х + 4)^2 - (3x - 1)(3x + 1) = 41. Решите пожалуйста!

Answer 1

$(3x+4)^2-(3x-1)(3x+1)=41\\9x^2+24x+16-(9x^2-1) = 41\\9x^2+24x+16-9x^2+1 = 41\\24x+17=41\\24x=41-17\\24x=24\\x=1$

Answer 2

$(3x+4)^2-(3x-1)(3x+1)=41\\\\9x^2+24x+16-(9x^2-1)=41\\\\24x+17=41\\\\24x=24\\\\x=1$