Phân tích đa thức thành nhân tử
Bài 2.
b) 4x3 +24x2 −12xy2
d) 4x2(x−y)+9y2(y−x)
f) 10x2 (a−2b)2 −(x2 +2)(2b−a)2 h)15am+2b−45amb (m *)
32()2 a) (x−3) +(x−4)(x−2)−(3−x) b) (2a−3b)(4a−b)− a2 −b2 −(3b−2a)
c) a8 −1 d) (x−y)2 +4(x−y)−12
g) (x+2)(x+3)(x+4)(x+5)−24 h) (x2 +6x+5)(x2 +10x+21)+15
b) 4x3 +24x2 −12xy2
d) 4x2(x−y)+9y2(y−x)
f) 10x2 (a−2b)2 −(x2 +2)(2b−a)2 h)15am+2b−45amb (m *)
32()2 a) (x−3) +(x−4)(x−2)−(3−x) b) (2a−3b)(4a−b)− a2 −b2 −(3b−2a)
c) a8 −1 d) (x−y)2 +4(x−y)−12
g) (x+2)(x+3)(x+4)(x+5)−24 h) (x2 +6x+5)(x2 +10x+21)+15