Question

Пожалуйста!!! Срочно !!!

Answer 1

1

а)

$frac{4 {}^{7} times 4 {}^{4} }{ {4}^{12} } = frac{4 {}^{11} }{4 {}^{12} } = frac{1}{4} = 0.25$

б)

$(4 {}^{2} ) {}^{4} times 4 = 4 {}^{8} times 4 = 4 {}^{9}$

2

$y(y - 3) - (y - 2) {}^{2} = y {}^{2} - 3y - y {}^{2} + 4y - 4 = y - 4$

3

а

$4a {}^{2} b - 4bc {}^{2} = 4b(a {}^{2} - c {}^{2} ) = 4b(a - c)(a + c)$

б

$2m(m + 3) + (m {}^{2} - 9) = 2m(m + 3) + (m - 3) (m + 3) = (2m + m - 3)(m + 3) =(3m - 3)(m + 3)=3 times (m - 1)(m + 3)$