Thực hiện phép tính
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1. THỰC HIỆN PHÉP TÍNH
1. \( x(x - 2) + (3 - x)(3 + x) \)
2. \( (x + 4)^2 - 2(x - 5) + (x + 4) + (x - 5)^2 \)
3. \( (16x^4 - 20x^2y^3 - 4x^5y) : (-4x^2) \)
4. \( 15 + x + (x - 5)(2x + 3) - 2x(x - 3) \)
5. \( (2x - 1)(x + 3) - (x - 2)^2 - x(x - 1) \)
6. \( (x - 3)(x^2 + 3x + 9) - x(x - 2)(x + 2) \)
7. \( -2x(-3x + 2) - (x + 2)^2 \)
8. \( \left[(4x^2y)^2 - 12x^2y^3 - 20x^3y^2\right] : (-2xy)^2 \)
9. \( x(3x + 12) - (7x - 20) + x^2(2x - 3) - x(2x + 5) \)
10. \( (2x + 1)^2 - (2x + 1)(6 - x) + (x - 3)^2 \)
1. THỰC HIỆN PHÉP TÍNH
1. \( x(x - 2) + (3 - x)(3 + x) \)
2. \( (x + 4)^2 - 2(x - 5) + (x + 4) + (x - 5)^2 \)
3. \( (16x^4 - 20x^2y^3 - 4x^5y) : (-4x^2) \)
4. \( 15 + x + (x - 5)(2x + 3) - 2x(x - 3) \)
5. \( (2x - 1)(x + 3) - (x - 2)^2 - x(x - 1) \)
6. \( (x - 3)(x^2 + 3x + 9) - x(x - 2)(x + 2) \)
7. \( -2x(-3x + 2) - (x + 2)^2 \)
8. \( \left[(4x^2y)^2 - 12x^2y^3 - 20x^3y^2\right] : (-2xy)^2 \)
9. \( x(3x + 12) - (7x - 20) + x^2(2x - 3) - x(2x + 5) \)
10. \( (2x + 1)^2 - (2x + 1)(6 - x) + (x - 3)^2 \)