√a^+2ab+b^2(a
问题描述:
√a^+2ab+b^2(a
答
√(a²+2ab+b²)
=√(a+b)²
=|a+b|
∵a
√a^+2ab+b^2(a
√(a²+2ab+b²)
=√(a+b)²
=|a+b|
∵a