1. (a+b⁶+5) . (ab⁶-5)=a²b^6+ab^(6+6)+5ab^6-5a-5b^6-25=a²b^6+ab^12+5ab^6-5a-5b^6-25
2. Como (a+b)(a-b)=a²-b² (1)
entonces (3x-1)(3x+1) =9x²-1
3. (h-9)(h+12)=h²+12h-9h-108=h²+3h-108
4. (x₋1₃) . ( x+ 4₃)=x²-4³x-1³x-1³4³
5. Se puede mostrar que (a+b+c)²=a²+b²+c²+2(ab+bc+ac). Usando esto tenemos que
( 3x-2y+4)²=9x²+4y²+16+2(12x-6xy-8y)
6. Usando (1)
{(m+n)+5} . {(m+n)-5}=(m+n)²-25=m²+2mn+n²-25
Salu2
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1. (a+b⁶+5) . (ab⁶-5)=a²b^6+ab^(6+6)+5ab^6-5a-5b^6-25=a²b^6+ab^12+5ab^6-5a-5b^6-25
2. Como (a+b)(a-b)=a²-b² (1)
entonces (3x-1)(3x+1) =9x²-1
3. (h-9)(h+12)=h²+12h-9h-108=h²+3h-108
4. (x₋1₃) . ( x+ 4₃)=x²-4³x-1³x-1³4³
5. Se puede mostrar que (a+b+c)²=a²+b²+c²+2(ab+bc+ac). Usando esto tenemos que
( 3x-2y+4)²=9x²+4y²+16+2(12x-6xy-8y)
6. Usando (1)
{(m+n)+5} . {(m+n)-5}=(m+n)²-25=m²+2mn+n²-25
Salu2