6x+3=0,
x=-1/2
(2x²)³÷(2x²)+(-x²)³÷(-x)²
=4x^4-x^4
=3x^4
=3×1/16
=3/16

2a+2b=3,
9的a次方X27的b次方
=3的(2a+3b)次方
=3³
=27