Question

1) (7x+1)^2
............

Answer 1

(7x) square +1 square+2(7x)(1)
49xsquare+14x+1

Answer 2

$hey \: mate \: here \: is \: your \: answer...$
$(7x + 1) {}^{2} = (7x) {}^{2} + (1) {}^{2} + 2 \times 7x \times 1$
$\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 49x^2+ 1 + 14x$
$\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 49x {}^{2} + 14x + 1$

$hope \: it \: helps.....$