Thực hiện phép tính: 1) x(1 - x) + (x - 1)²; 2) (x - 3)² - x² + 10x - 7; 3) (x + 2)² - (x - 3)(x + 1); 4) (x + 4)(x - 2) - (x - 3)²

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Bài 4: Thực hiện phép tính

1) x(1 - x) + (x - 1)²
2) (x - 3)² - x² + 10x - 7
3) (x + 2)² - (x - 3)(x + 1)
4) (x + 4)(x - 2) - (x - 3)²
5) (x - 2)² + (x - 1)(x + 5)

7) (1 - 2x)(5 - 3x) + (4 - x)²
9) (x + 1)² - (x - 2)(x - 2) - 4x
11) (x + 4)² + (x + 5)(x - 5) - 2x(x + 1)
13) (x - 1)² = 2(x + 3)(x - 3) + 4x(x - 4)

8) (x - 2)(x + 2) - (x - 3)(x + 1)
10) (x + 2)² - (x + 3)(x - 3) + 10
12) (x - 1)² - (x - 4)(x + 4) + (x + 3)²
14) (1 - 3)(1 + 3)(1² + 9) - (1² + 2)(1² - 2)