Điền vào chỗ trống
a) ( ...... + ......) ( 9x3 - ...... + 1 ) = ( .......)3 + (.....)3
b) ( x + .......) ( ...... - ......+ 16) = ( .....)3 + (.....)3
c) ( ......+.....) ( 25x2 - 10x + ....) = (.....)3 + (.....)3
d) (...... + .....) ( ..... - 6x + 9 ) = ( ....)3 + (.....)3
e) (...... + ....) (.... - 12x + .....) = (.....)3 + (....)3
a. (3x +1) (9x3 - 3x +1) = (3x)3 + 13
b.(x+4)(x2-4x+16)=x3+43
c. (5x+2)(25x2-10x+4)=(5x)3+23
d. (2x+3)(4x2-6x+9)=((2x)3+33
e. Đoán xem