Question

(a+b)² - c² / a+b+c

rút gọn phân thức trên

Answer 1

\(\frac{\left(a+b\right)^2-c^2}{a+b+c}=\frac{\left(a+b+c\right)\left(a+b-c\right)}{a+b+c}=...\)

And... u know dat? =))

Chúc bạn học tốt nha.

Answer 2

\(\frac{\left(a+b\right)^2-c^2}{a+b+c}=\frac{\left(a+b+c\right)\left(a+b-c\right)}{a+b+c}=\frac{a+b-c}{a+b+c}\)

Answer 3

\(\left(a+b\right)^2-c^2=\left(a+b+c\right)\left(a+b-c\right)\Rightarrow\frac{\left(a+b\right)^2-c^2}{a+b-c}=a+b-c\)