Question

xsquare-4+xsquare+4+16

Answer 1

x²-4+x²+4+16
= 2x²+16
= 2(x²+8)

Answer 2

$= {x}^{2} - 4 + {x}^{2} + 4 + 16 \\ = 2 {x}^{2} + 16 \\ = 2( {x}^{2} + 8)$