Question

1. Phân tích đa thức sau thành nhân tử ( x + 2) ² - 16

Answer 1

\(\left(x+2\right)^2-16\\ \backslash=\left(x+2-4\right)\left(x+2+4\right)\\ =\left(x-2\right)\left(x+6\right)\)

Answer 2

(x+2)²-4²=(x+2-4)(x+2+4)

Answer 3

 ( x + 2) ² - 16

= (x+2)² -  4²

= (x+2-4) . (x+2+4)

= (x -2) . (x+6) 

Answer 4

\(\left(x+2\right)^2-16\\ =\left(x+2-4\right)\left(x+2+4\right)\\ =\left(x-2\right)\left(x+6\right)\)