Question

примени формулу сокращённого умнажения

Answer 1

$(a + 2) {}^{2} = a {}^{2} + 2a \times 2 + 2 {}^{2} = a {}^{2} + 4a + 4$

$(6 - x) {}^{2} = 36 - 12x + x {}^{2} \frac{}{} {}^{}$

$( \frac{1}{2} a + b) {}^{2} = \frac{1}{4} a {}^{2} + ab + b {}^{2}$

$(3x - 4) \frac{}{} {}^{2} = (3x) {}^{2} - 2 \times 3x \times 4 + 4 {}^{2} = 9x {}^{2} - 24x + 16$

$(5m + 3n) {}^{2} = 25m {}^{2} + 30mn + 9n {}^{2}$

$(n {}^{2} + 1) {}^{2} = n {}^{4} + 2n {}^{2} + 1$

$(0.1a + 10b) {}^{2} = \frac{1}{100} a {}^{2} + 2ab + 100b {}^{2}$

$(6x - \frac{1}{3} y) {}^{2} = 36x {}^{2} - 4xy + \frac{1}{9} y {}^{2}$

$(3a - 2b)(3a + 2b) - (a + 3b) {}^{2} = 9a {}^{2} - 4b {}^{2} - a {}^{2} - 6ab - 9b {}^{2} = 8a {}^{2} - 13b {}^{2} - 6ab$

$(y - 4)(y + 3) + (y + 1) {}^{2} - (7x - y)(7x + y) = {y}^{2} + 3y - 4y - 12 + y {}^{2} + 2y + 1 - 49x {}^{2} + y {}^{2} = 3y {}^{2} + y - 11 - 49x {}^{2}$

Удачи!