Điền vào chỗ trống
Bài 1: a) ..... + 6xy + 9y^2 = ( x + .....)^2
b) x^2 + ..... + 4y^2 = ( ..... + ..... )^2
c) 4x^2 + xy + ..... = ( ..... + .....)^2
d) ..... + 2xy + y^2 = ( x + .....)^2
e) 9x^2 - ..... + 1/4y^2 = ( ..... + .....)^2
f) 2x^2 + 2y + ..... = ( ..... + .....)^2
b) x^2 + ..... + 4y^2 = ( ..... + ..... )^2
c) 4x^2 + xy + ..... = ( ..... + .....)^2
d) ..... + 2xy + y^2 = ( x + .....)^2
e) 9x^2 - ..... + 1/4y^2 = ( ..... + .....)^2
f) 2x^2 + 2y + ..... = ( ..... + .....)^2