A. c2-d2 b. 1-a2 c. 16×2-9y

A) (c+d).(c-d)

b) (a+1).(a-1)

c) (4x+3y).(4x-3y)

Ingat bahwa a² – b² = (a+b)(a-d)
A. c² – d² = (c+d)(a-d)
B. 1 – a² = 1² – a² = (1-a)(1+a)
C. 16x² – 9y² = 4²x² – 3²y² = (4x)² – (3y)² = (4x+3y)(4x-3y)

Semoga membantu… ^_^