a) 473 \(\cdot\) 567 + 523 \(\cdot\) 567 = 567 \(\cdot\) (473 + 523) = 567 \(\cdot\) 996 = 564732
б) 328 \(\cdot\) 1997 - 328 \(\cdot\) 1497 = 328 \(\cdot\) (1997 - 1497) = 328 \(\cdot\) 500 = 164000
в) \(\frac{526^2 \cdot 524 + 526 \cdot 524^2}{524^2 \cdot 526 - 524 \cdot 526^2} = \frac{526 \cdot 524 \cdot (526 + 524)}{524 \cdot 526 \cdot (524 - 526)} = \frac{1050}{-2} = -525\)
г) \((\frac{6}{7} \cdot 454 - \frac{6}{7} \cdot 440)^2 = (\frac{6}{7} \cdot (454 - 440))^2 = (\frac{6}{7} \cdot 14)^2 = (6 \cdot 2)^2 = 12^2 = 144\)
д) 1001² - 1001 = 1001 \(\cdot\) (1001 - 1) = 1001 \(\cdot\) 1000 = 1001000
a) 3a - 3b = 3(a - b)
б) 75a + 125b = 25(3a + 5b)
в) ab + ac - 2ad = a(b + c - 2d)
г) 7ab + a - 2ad = a(7b + 1 - 2d)
a) 35a²b³ - 21a³b² = 7a²b²(5b - 3a)
б) 4mn⁵ - 12m²n² + 104m³n³ = 4mn²(n³ - 3m + 26m²n)
a) 2³ \(\cdot\) 5⁴ + 2⁴ \(\cdot\) 5³ = 2³ \(\cdot\) 5³(5 + 2) = 8 \(\cdot\) 125 \(\cdot\) 7 = 1000 \(\cdot\) 7 = 7000
б) 5³ \(\cdot\) 7⁵ \(\cdot\) 23 - 5³ \(\cdot\) 7⁵ \(\cdot\) 18 = 5³ \(\cdot\) 7⁵ (23 - 18) = 125 \(\cdot\) 16807 \(\cdot\) 5 = 10504375
a) 2x(y - 4) - 3y(y - 4) = (y - 4)(2x - 3y)
б) (2 - a)² - 5(a - 2) = (2 - a)² + 5(2 - a) = (2 - a)(2 - a + 5) = (2 - a)(7 - a)
a) 7x² + 3x = 0, x(7x + 3) = 0
б) x² - 13x = 0, x(x - 13) = 0