\(2x\left(x-4\right)^2-\left(x+5\right)\left(x-2\right)+2\left(x-5\right)^2-\left(x-1\right)^2\)
\(=2x\left(x^2-8x+16\right)-\left(x^2-2x+5x-10\right)+2\left(x^2-10x+25\right)-\left(x^2-2x+1\right)\)
\(=2x^3-16x^2+32x-x^2-3x+10+2x^2-20x+50-x^2+2x-1\)
\(=2x^3-16x^2+11x+59\)
Phân tích đa thức thành nhân tử:
1). (x - 3)(x - 1) - 3(x - 3)
2). (6x + 3) - (2x - 5)(2x + 1)
3). (x - 1)(2x + 1) + 3(x - 1)(x + 2)(2x + 1)
4). (3x - 2)(4x - 3) - (2 - 3x)(x - 1) - 2(3x - 2)(x + 1)
5). \(\left(x-5\right)^2+\left(x+5\right)\left(x-5\right)-\left(5-x\right)\left(2x+1\right)\)
6). (a - b)(a + 2ab) - (b - a)(2a - b) - (a - b)(a + 3b)
Tìm x biết a) x(x-25)=0 b)2x(x-4)-x(2x-1)=-28 c)x^2 -5x=0 d)(x-2)^2-(x+1)(x+3)=-7 e)(3x+5).(4-3x)=0 f)x^2-1/4=0
Bài 1: Phân tích thành nhân tử 3) x ^ 2(x - 1) + 2x * (1 - x) 5) y ^ 2(x ^ 2 + y) - zx ^ 2 - zy 7) 5(x + y) ^ 2 + 15(x + y) 9) 7x(y - 4) ^ 2 - (4 - y) ^ 3; 11)(x+1)(y-2)-(2-y)^ 2 2) 5x(x - 2) - 3x ^ 2(x - 2) 4) 3x(x - 5y) - 2y(5y - x) 6) b(a - c) + 5c - 5a 8) 9x(x - y) - 10(y - x) ^ 2 10) (a - b) ^ 2 - (a + b)(b - a) 12) 2x(x - 3) + y(x - 3) + (3 - x)
giai nhung phuong trinh sau
3(x-2)+4=5x-2(x-1)
2(x-2)-3(1-2x)=5
x2 - 1 -2xy +2y
( x + 3 )2 - ( 2x - 5 ) x ( x + 3 )
( 3x + 2 )2 + ( 3x -2 )2 -2 ( 9x2 - 4 )
bài 1: phân tích đa thức thanh nhân tử
1) x2 - 2x - 4y2 - 4y 2) x4 + 2x3 - 4x - 4 3) x3 +2x2y -x - 2y
4) 3x2 - 3y2 - 2(x - y)2 5) x3 - 4x2 -9x + 36 6) x2 - y2 - 2x - 2y
7) (3x-1)2 - 16 8) (5x - 4)2 - 49x2 9) (2x +5) - (x-9)2
a. (2x+y)\(^2\)+(xy)\(^2\)+2(2x+y)(x-y)
b. 5(2x-1)\(^2\)+4(x-1)(x+3)-2(5-3x)\(^2\)
