Question

efetue ( x+1 ) ( x-1 ) + ( x+2 ) ( x-2 )

Answer 1

x+1 = 1x. x+2= 2x
x-1= -1x x-2= -2x. = -8x

Answer 2

$(x + 1)(x - 1) + (x + 2)(x - 2) \\ {x}^{2} - 1 + {x}^{2} - 4 \\ {2x}^{2} - 5$