Algebra-1

Let's expand each of the given formulas using the formula (a + b)² = a² + 2ab + b²:

For option A:
a = 16x, b = 1
then, (16x + 1 )² = (16x)² + 2(16x)(1) + (1)² = 256x² + 32x + 1.

For option B:
a = 8x, b = 1
then, (8x + 1 )² = (8x)² + 2(8x)(1) + (1)² = 64x² + 16x + 1.

For option C:
a = 4x, b = 2
then, (4x + 1 )