1) 12x^2 - (4x-3)(3x+1) = -2Раскроем скобки:12x^2 - (12x^2 + 4x - 3x - 3) = -212x^2 - 12x^2 - x + 3 = -2-x + 3 = -2-x = -5x = 5
2) (4x-3)(3+4x) - 2x(8x-1) = 0Раскроем скобки:12x + 16x^2 - 9 - 12x^2 + 2x = 012x - 9 + 2x = 014x - 9 = 014x = 9x = 9/14
3) x + (5x+2)^2 = 25(1+x^2)Раскроем квадрат:x + 25x^2 + 20x + 4 = 25 + 25x^2Упростим:20x + 4 = 2520x = 21x = 21/20
1) 12x^2 - (4x-3)(3x+1) = -2
Раскроем скобки:
12x^2 - (12x^2 + 4x - 3x - 3) = -2
12x^2 - 12x^2 - x + 3 = -2
-x + 3 = -2
-x = -5
x = 5
2) (4x-3)(3+4x) - 2x(8x-1) = 0
Раскроем скобки:
12x + 16x^2 - 9 - 12x^2 + 2x = 0
12x - 9 + 2x = 0
14x - 9 = 0
14x = 9
x = 9/14
3) x + (5x+2)^2 = 25(1+x^2)
Раскроем квадрат:
x + 25x^2 + 20x + 4 = 25 + 25x^2
Упростим:
20x + 4 = 25
20x = 21
x = 21/20