Bsr,
-2x(x-3)-(2x-5)(x+1)
= -2x²+6x-(2x²+2x-5x-5)
= -2x²-2x²+6x-2x+5x+5
= -4x²+9x+5
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Bsr,
-2x(x-3)-(2x-5)(x+1)
= -2x²+6x-(2x²+2x-5x-5)
= -2x²-2x²+6x-2x+5x+5
= -4x²+9x+5