Question

KHAI TRIỂN CÁC HĐT: 

( x + 2 )²

( x + 3 )²

( 4 + x )²

( x + 1 ) ²

( 1 + x )²

Answer 1

a: \(\left(x+2\right)^2=x^2+4x+4\)

b: \(\left(x+3\right)^2=x^2+6x+9\)

c: \(\left(x+4\right)^2=x^2+8x+16\)

d: \(\left(x+1\right)^2=x^2+2x+1\)

Answer 2

\(\left(x+2\right)^2=x^2+4x+4\\ \left(x+3\right)^2=x^2+6x+9\\ \left(4+x\right)^2=x^2+8x+16\\ \left(x+1\right)^2=x^2+2x+1\\ \left(1+x\right)^2=1+2x+x^2\)