Question

resolva (4x+2)²-(3x-5)² b)5x (2x-2y)+(x+y)²

Answer 1

( (4x)² + 2*4x*2 + 2² ) - ( (3x)² - 2*3x*5 + 5² ) =
16x² + 16x+  4 - ( 9x² -30x + 25 ) = 0
16x² - 9x² + 16x + 30x + 4 - 25 = 0
7x² + 46x - 21 = 0

b
10x² -10xy + ( x² + 2 *x*y + y² )=
10x² - 10xy + x² + 2xy + y² =
11x² - 8xy + y²