Question

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

\(B) x^4 +4\)

Answer 1

Em học lớp 8 hả 

Answer 2

a: \(x^2-x-6=\left(x-3\right)\left(x+2\right)\)

b: \(x^4+4\)

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

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

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

Answer 3

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

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

Answer 4

Đề bài là gì vậy em , hỏi z ai bít trả lời thế nào ?

Answer 5

a, x^2-3x+2x-6

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

=(x+2)(x-3)

b, hơi khó hiểu:L

Answer 6

\(A.x^2-x-6=x^2-3x+2x-6=x\left(x-3\right)+2\left(x-3\right)=\left(x-3\right)\left(x+2\right)\)

\(B.x^4+4=x^4+4x^2+4-4x^2=\left(x^2+2\right)^2-4x^2=\left(x^2+2-2x\right)\left(x^2+2+2x\right)\)