Question

已知x=1又1/2，化简并计算:（1-2x）²（2x+1）²-（3+2x）²（3-2x）²

Answer 1

(1—2x)²(2x+1)²—(3+2x)²(3—2x)²,
=(1-4x²)²-(9-4x²)²
=(1-4x²+9-4x²)(1-4x²-9+4x²)
=-8(10-8x²)
=16(4x²-5)
=16×(9-5)
=64