a) (5x+2)(-2x-6)
b) (2V2+3)(V2+5)
c) -(3x+2y-3)-(6x-4y+2)
d) -(-4x-2y+2)-(4x-6y-3)
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a) (5x+2)(-2x-6)=-10 -30x-4x-12= -10 -34x-12
b) (2V2+3)(V2+5)= 4+10 +3 +15= 13 +19
c)-(3x+2y-3)-(6x-4y+2)= -3x-2y+3-6x+4y-2= -9x+2y+1
d) -(-4x-2y+2)-(4x-6y-3)= 4x+2y-2-4x+6y+3=8y+1