A=(2x-3)(4-5x)
=2x*4+2x*(-5x)-3*4-3*(-5x)
=8x-10x²-12+15x
A=-10x²+23x-12
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A=(2x-3)(4-5x)
=2x*4+2x*(-5x)-3*4-3*(-5x)
=8x-10x²-12+15x
A=-10x²+23x-12