Giải hộ m bài 16 đến 23 với ạ
----- Nội dung dịch tự động từ ảnh -----
8) -6x²(x + 5)² -(x-3)² + (x²-2) (2x² +1)-4x² (3x-4)²
2
9) (5x-3y)²-(4x + y) (4x-y)-(3x + 5y)² + (x - 3y) (x + y)
10) (-4x+2y) (-4x-2y)+(x-5y)2-(3x + 2y)² -7x(x-3y)
11) 3x(x - 5)² - (x + 2)³ + 2(x-1)³ - (2x + 1)(4x² - 2x + 1)
12) –5x(x → 3)(x + 3) + (x + 1)® − (x − 2)* + (x − 1)(x + x + 1)
13) (x-4)³ - 2x(x - 5)² + (x - 4)(x² + 4x + 16) - (x - 3)³
14) (x + 5)(x² - 5x + 25) - (x + 3)³ + (x-2)(x² + 2x + 4) - (x - 1)³
15) (x-7)(x² + x) - (x + 2) - (x-7)(x² + 7x +49) + (x + 1)³
16) (x - 5)³ - (x - 2)(x + 1)² + (x − 3)(x² + 3x + 9) - (x + 2)³
17) (2x - 3)(4x² + 6x + 9) - (2x - 1)³ + (3x + 1)(9x² - 3x + 1)
18) (2x + 1)³ - (5x + 2)(25x² - 10x + 4) + (x - 5)³ - (5 + 3x)³
19) (3x - 2y)³ - (4x - 5y)(16x² + 20xy + 25y²) + (y + 2x)³
20) (x + 3y)³ + (3x + 2y)(9x² - 6xy + 4y²) - (2y - 3x)³
21) (5x - y)(25x² + 5xy + y²) - (x - 2y)³ - 3(2x + y)³
22) −4(x+3y)³ + (x − 3y) (x+y)(x −y) - (2x - y)³
23) (3x + y)³ -(5x - y) (25x² + 5xy + y²) + (x + 2y)³
Bài 14: Tìm x, biết
1) (x - 5)(x+5)-(x + 3)² + 3(x − 2)² = (x + 1)² − (x + 4) (x − 4)
2) (2x + 3)² + (x - 1)(x + 1) = 5(x + 2)² - (x - 5)(x + 1) + (x+4)²
3) (-x+5)(x-2) + (x −7) (x + 7) = (3x + 1)²-(3x - 2) (3x + 2)
4) (5x-1)(x+1)-2(x-3) = (x+2) (3x-1)-(+4)² + (x² -
5) (4x-1)²-(3x + 2) (3x - 2) = (7x-1)(x + 2) + (2x + 1)²-(4
6) (2x + 3)² - (5x - 4)(5x + 4) = (x+5)²-(3x - 1)(7x + 2) - (x²
7) (1-3x)²-(x-2) (9x + 1) = (3x-4) (3x + 4) - 9(x+3)²
8) (3x + 4)(3x - 4) - (2x + 5)² = (x - 5)² + (2x + 1)² - (x² - 2x)
4:
2