Question

[gh]

phan tich cac da thuc sau thanh nhan tư

a) \(x^3+5x^2+6x\)

b)\(x^2-6x+8\)

c)\(2x^2+98+28x-8y^2\)

Answer 1

[Hiên Nguyễn]

a) x^3 +5x^2+6x

= x^3+2x^2+3x^2+6x

=x*(x+3)*(x+2)

b) x^2-6x+8

= x^2-2x-4x+8

=(x-2)*(x-4)

c)2x^2+98+28x-8y^2

=2(x^2+14x+49-4y^2)

=2*[(x+7)^2-4y^2]

2*(x-7-2y)*(x-7+2y)

Answer 2

[hồ công thành]

a) x² + 2x² + 3x² + 6x

= x( x+2 ) + 3( x+2 )

=(x+3)(x+2)

b) x² - 2x - 4x + 8

=x(x-2)-4(x-2)

=(x-4)(x-2)

c)