Question

Giải hộ

Answer 1

Bài 1 )

\(B=\frac{B}{3x-2}=\frac{15x^2+10x}{9x^2-4}\)

\(\Leftrightarrow B=\frac{B}{3x-2}=\frac{5x\left(3x+2\right)}{\left(3x+2\right)\left(3x-2\right)}\)

\(\Leftrightarrow B=\frac{B}{3x-2}=\frac{5x}{3x-2}\)

\(\Leftrightarrow B=5x\)

Answer 2

2b)

\(\frac{x}{x-3}+\frac{9-6}{x^2-3}\)

\(\Leftrightarrow\frac{x\left(x+3\right)}{\left(x-3\right)\left(x+3\right)}+\frac{3}{\left(x-3\right)\left(x+3\right)}\)

\(=\frac{x^2+3x+3}{\left(x-3\right)\left(x+3\right)}\)

Answer 3

2a)

cx mẫu bạn tự làm nhé