Question

Tolong dibantu -/\-

ayo senpai bantu :v

Answer 1

A. (x-5)(x+9) = 0   atau    x²+4x-45 = 0
b.        x² + 2x = 0
    x² + (1/2.b)² = (1/2.b)²
    x² + (1/2.2)² =(1/2.2)²
            x² +1² = 1
           (x+1)²  =1
              x+ 1 =
             x + 1 = 1
jadi x = 0 atau x = -2 dan penambahnya (1/2.b)² = (1/2.2)² = 1² = 1