Question

Desenvolva a) (4×-b).(4×b)

B) (3c-5)2


C) (2+4×)2

Answer 1

a) (4× - b).(4 × - b) = 16x² - 2.4x.b + b² = 16x² - 8bx + b²

B) (3c-5)² = 9c² - 2.5.3c + 25 = 9c² - 30c + 25


C) (2+4×)² = 2² + 2.2.4x + (4x)² = 4 + 16x + 16x²