Question

phân tích các đa thức thành nhân tử 

a) 36a⁴-y²

b) 6x²+x-2 

Answer 1

a)

\(36a^4-y^2\)

\(\left(6a^2\right)^2-y^2=\left(6a^2-y\right)\left(6a^2+y\right)\)

b)

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

\(=6x^2+4x-3x-2\)

\(=2x\left(3x+2\right)-\left(3x+2\right)\)

\(=\left(3x+2\right)\left(2x-1\right)\)

Answer 2

a: =(6a^2-y)(6a^2+y)

b: =6x^2+4x-3x-2

=(3x+2)(2x-1)

Answer 3

\(36a^4-y^2=\left(6a^2\right)^2-y^2=\left(6a^2-y\right)\left(6a^2+y\right)\)

\(6x^2+x-2=6x^2-3x+4x-2=3x\left(2x-1\right)+2\left(2x-1\right)=\left(2x-1\right)\left(3x+2\right)\)

Answer 4

\(a,36a^4-y^2\\ =\left(6a^2\right)^2-y^2\\ =\left(6a^2-y\right)\left(6a^2+y\right)\)

\(b,6x^2+x-2\\ =6x^2+4x-3x-2\\ =\left(6x^2+4x\right)-\left(3x-2\right)\\ =2x\left(3x+2\right)-\left(3x-2\right)\\ =\left(2x-1\right)\left(3x+2\right)\)