Question

Решите пожалуйста, прошу...иначе я завтра получу 2(((

Answer 1

1)
$\sqrt{9} \times \sqrt{16} - \sqrt{25} \times \sqrt{36} = 3 \times 4 - 5 \times 6 = 12 - 30 = - 18$
2)
$\sqrt{ {75}^{2} - 2 \times 75 \times 74 + {74}^{2} } = \sqrt{ {(75 - 74)}^{2} } = \sqrt{ {1}^{2} } =1$
3)
$\sqrt{ {19}^{2} - 162 \times 19 + {81}^{2} } = \sqrt{ {19}^{2} - 2 \times 81 \times 19 + {81}^{2} } = \sqrt{ {(19 - 81)}^{2} } = 62$
4)
$(1 - \sqrt{441} )(1 + \sqrt{441} ) = {1}^{2} - { \sqrt{441} }^{2} = 1 - 441 = - 440$

Answer 2

=3*4-5*6=12-30=-18

=√(5625-11100+5476)=√1=1

=√(361-3078+6561)=√(3844)=62

=(1-21)(1+21)=-20*22=-440