Question

ребят,помогите,дам 35 баллов ​

Answer 1

$1.$

$a) \: \: \: \: \: {36x}^{2} - {y}^{2} = (6x - y)(6x + y)$

$б) \: \: \: \: \: {0.04a}^{2} - 9 {c}^{2} = (0.2a - 3c)(0.2a + 3c)$

$в) \: \: \: \: \: {a}^{12} - 1 = ( {a}^{6} - 1)( {a}^{6} + 1)$

$2.$

${135}^{2} - {35}^{2} = (135 - 35)(135 + 35) = 100 \times 170 = 17000$

$б) \: \: \: \: \: {8.9}^{2} - {1.1}^{2} = (8.9 - 1.1)(8.9 + 1.1) = 7.8 \times 10 = 78$

$3.$

${a}^{2} + ab - 5a - 5b = a(a + b) - 5(a + b) = (a + b)(a - 5)$