Question

СРОЧНО ПОМОГИТЕ!!!!!

Answer 1

1) 46²-92*31+31²= 46²-2*46*31+31²=(46-31)²=15²=225

2)

$\frac{38^{2} -17^{2} }{47^{2} -361} =\frac{(38-17)(38+17)}{47^{2} -19^{2} } =\frac{(38-17)(38+17)}{(47-19)(47+19) } =\frac{21*55}{28*66} =\frac{3*5}{4*6} =\frac{5}{8}$