Question

simplifique as expressões:
a) (2x+3y)² - 4x (x+3y)
b) (49x+2)² - 4x (5-2)

Answer 1

a) (2x+3y)² - 4x (x+3y)
    
   4x^2 + 12xy + 9y^2 - 4x^2 - 12xy

            9y^2   ou ( 3y)^2

b) (49x+2)² - 4x (5-2)

    2401x^2 + 196x + 4 - 20x + 8x

    2401x^2 + 184x + 4