Question

A\ (x+1)²+(x+2)²
B\ (2x+1)²+(3x+1)²
C\ 5x-(2x+3)²
D\ (x+5)²-x(x+3)

Answer 1

A)
$x {}^{2} + 2x + 1 + x {}^{2} + 4x + 4 \\ 2x {}^{2} + 6x + 5$
B)
$4x {}^{2} + 4x + 1 + 9x {}^{2} + 6x + 1 \\ 13x {}^{2} + 10x + 2$