Przedstaw sumy w postaci iloczynu:
a) x2 -5x4
b) y6 - 125y3
c) 2ab - b - 4a +2
a/
x^2-5*x^4=x^2*(1-5x^2)=x^2*(1-5pod pierwiastkiem*x)*(1+5pod pierwiastkiem*x)
b/
y^6-125y^3=y^3*(y^3-125)=y^3*(y^3-5^3)=y^3*(y-5)*(y^2-5y+25)
c/
2ab-b-4a+2= (2ab-b)-(4a-2)=b(2a-1)-2(2a-1)=(2a-1)*(b-2)
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a/
x^2-5*x^4=x^2*(1-5x^2)=x^2*(1-5pod pierwiastkiem*x)*(1+5pod pierwiastkiem*x)
b/
y^6-125y^3=y^3*(y^3-125)=y^3*(y^3-5^3)=y^3*(y-5)*(y^2-5y+25)
c/
2ab-b-4a+2= (2ab-b)-(4a-2)=b(2a-1)-2(2a-1)=(2a-1)*(b-2)