因式分解3xy³-3xy,0.04x²-0.81y²
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因式分解3xy³-3xy,0.04x²-0.81y²因式分解3xy³-3xy,0.04x²-0.81y²因式分解3xy³-3xy,
因式分解3xy³-3xy,0.04x²-0.81y²
因式分解3xy³-3xy,0.04x²-0.81y²
因式分解3xy³-3xy,0.04x²-0.81y²
3xy³-3xy
=3xy(y²-1)
=3xy(y+1)(y-1)
0.04x²-0.81y²
=(0.2x)²-(0.9y)²
=(0.2x+0.9y)(0.2x-0.9y)