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Respuestas a la pregunta
Respuesta:
(a+3)(a-1)=a²+2a-3
(a-3)(a+1)=a²-2a-3
(x+5)(x-4)=x²+x-20
(m-6)(m-5)=m²-11m+30
(-x+3)(-x+5)=x²-8x+15
(-a-2)(-a-3)=a²+5a+6
(3x-2y)(y+2x)=3xy+6x²-2y²-4yx
(-4y+5y)(-3x+2y)=12yx-8y²-15yx+10y²
(5a-7b)(a+3b)=5a²+15ab-7ba-21b²
(7x-3)(4+2x)=14x²+25x-12
(-a+b)(-4b+8a)=-8a²-4b²+12ba
(6m-5n)(-n+m)=-6mn+6m²+5n²-5nm
(8n-9m)(4n+6m)=32n²+48nm-36mn-54m²
(-7y-3)(-11+2y)=-14y²-83y+33
Explicación paso a paso:
(a+3)(a-1)=a²-1a+3a-3
=a²+2a-3
(a-3)(a+1)=a²+1a-3a-3
=a²-2a-3
(x+5)(x-4)=x²-4x+5x-20
=x²+x-20
(m-6)(m-5)=m²-5m-6m+30
=m²-11m+30
(-x+3)(-x+5)=x²-5x-3x+15
=x²-8x+15
(-a-2)(-a-3)=a²+3a+2a+6
=a²+5a+6
(3x-2y)(y+2x)=3xy+6x²-2y²-4yx
(-4y+5y)(-3x+2y)=12yx-8y²-15yx+10y²
(5a-7b)(a+3b)=5a²+15ab-7ba-21b²
(7x-3)(4+2x)=28x+14x²-12-3x
=14x²+25x-12
(-a+b)(-4b+8a)=4ba-8a²-4b²+8ba
=-8a²-4b²+12ba
(6m-5n)(-n+m)=-6mn+6m²+5n²-5nm
(8n-9m)(4n+6m)=32n²+48nm-36mn-54m²
(-7y-3)(-11+2y)=-77y-14y²+33-6y
=-14y²-83y+33