Question

Phân tích đa thức thành nhân tử
1, 4x² - 13x + 9
2, 5x² + 17x + 12
3, x² - 3x - 10
4, x² + x - 12
5, x³ + 5x² + 3x - 9
6, x_³ - 7x + 6
7, x⁵ - 5x³ + 4x
8, 4x⁴ - 21x²y² + y⁴
9, 2a²b + 4ab² - a²c + ac² - 4b²c + 2bc² - 4abc
10, 8x³(y+z) - y³(z+2x) - z³(2x-y)

Answer 1

1.

= 4x\(^{^{ }2}\)-4x-9x+9

=4x(x-1)-9(x-1)

=(4x-9)(x-1)

Answer 2

2.

=5x\(^2\)+5x+12x+12

=5x(x+1)+12(x+1)

=(5x+12)(x+1)

Answer 3

3.

= x\(^2\)-2x+5x-10

=x(x-2)+5(x-2)

=(x+5)(x-2)

Answer 4

4.

=x\(^2\)-3x+4x-12

=x(x-3)+4(x-3)

=(x+4(x-3)