Question

помогите пожалуйста ​

Answer 1

НОМЕР 3.

$a) \ \ \ {87}^{2} - 174 \times 37 + {37}^{2} = \\ \\ {87}^{2} - 2 \times 87 \times 37 + {37}^{2} = \\ \\ \\ (87 - 37 {)}^{2} = 5 {0}^{2} = 2500.$

$b) \ \ \ \frac{8 {8}^{2} - {46}^{2} }{ {29}^{2} - 361} = \\ \\ \\ \frac{ {88}^{2} - {46}^{2} }{ {29}^{2} - {19}^{2} } = \\ \\ \\ \frac{(88 - 46)(88 + 46)}{(2 9 - 19)(29 + 19)} = \\ \\ \\ \frac{42 \times 134}{10 \times 48} = \frac{7 \times67 }{5 \times 8} = \\ \\ \\ \frac{469}{40} = 11 \frac{29}{40} .$