Question

Fatores as diferenças entre dois quadrados

Answer 1

a)x²-25=0⇒√x²=x e √25=5 R: (x-5).(x+5)

b) 4y² -16x²⇒√4y²=2y e √ 16x²=4x. R: ( 2y-4x).(2y+4x)

c) 9x²-16m²⇒√9x²=3x e √16m²=4m R: (3x-4m).(3x+4m)

d) x²/36-81⇒ √x²/36= x/6 e √81=9 R: (x/6-9).(x/6+9)