Question

simplify (x-4)(x+4)+16​

Answer 1

$(x + 4)(x + 4) + 16 \\ 4x + 4x + 16 \\ 8x + 16 \\ x = \frac{16}{8 } \\ cut \: them \\ answer \: will \: be \: = 2$

Answer 2

$a ^{2} + b ^{2} = (a \: + b)(a \: -b)$

$(x ^{2} + 4 ^{2} ) + 16$

$x ^{2} + 16 + 16$