Question

( x² + 3 )²

Answer 1

\(\left(x^2+3\right)^2=\left(x^2\right)^2+2.x^2.3+3^2=x^4+6x^2+9\)

Answer 2

= x^4 + 2.x^2.3 + 3^2

= x^4 + 6x^2 + 9 

Answer 3

 (x²+3)² = (x²)²+2.3.x²+3²=x⁴+6x²+9 

 

 

Answer 4

Ta có: \(\left(x^2+3\right)^2\)

\(=\left(x^2\right)^2+2\cdot x^2\cdot3+3^2\)

\(=x^4+6x^2+9\)