Me ajudem, preciso resolver essa questão...
a) [tex]\text{ab}+\text{ac}=\text{a}\cdot(\text{b}+\text{c})[/tex]
b) [tex]\text{x}^4+\text{x}^3+\text{x}^2=\text{x}^2\cdot(\text{x}^2+\text{x}+1)[/tex]
c) [tex]\text{am}+\text{na}+\text{bm}+\text{bn}=\text{a}\cdot(\text{m}+\text{n})+\text{b}\cdot(\text{m}+\text{n})[/tex]
[tex]=(\text{a}+\text{b})\cdot(\text{m}+\text{n})[/tex]
d) [tex]\text{xy}-\text{yz}+\text{wx}-\text{wz}=\text{y}\cdot(\text{x}-\text{z})+\text{w}\cdot(\text{x}-\text{z})[/tex]
[tex]=(\text{y}+\text{w})\cdot(\text{x}-\text{z})[/tex]
e) [tex]\text{x}^2-\text{y}^2=(\text{x}+\text{y})\cdot(\text{x}-\text{y})[/tex]
f) [tex]\text{a}^2-36=(\text{a}+6)\cdot(\text{a}-6)[/tex]
g) [tex]\text{x}^2-14\text{x}+49=(\text{x}-7)^2[/tex]
h) [tex]\text{y}^2+2\text{y}+1=(\text{y}+1)^2[/tex]
i) [tex]\text{a}^2-20\text{a}+100=(\text{a}-10)^2[/tex]
j) [tex]9\text{x}^2+36\text{xy}+36\text{y}^2=(3\text{x}+6\text{y})^2[/tex]
k) [tex]\text{y}^2-16\text{y}+64=(\text{y}-8)^2[/tex]