Question

01 - Calcule:
A) (5x + 10)²
B) (3x - 7)²
C) (2x + 10) (2x - 10)

Answer 1

A)(5x+10)^2= (5x + 10) × (5x +10)= 5x^2 + 100x + 100, simplifiicando por 5 fica x^2 + 20x + 20. B)(3x-7)^2= (3x-7) × (3x-7) = 9x^2 - 42x + 49. C)(2x + 10) × (2x - 10)= 2x^2 - 10^2(diferença de quadrado)= 2x^2 - 100= x^2 -50.