Question

упростите выражение b^2-6b+9/b-7*b-7/b-3

Answer 1

$\frac{b^{2}-6b+9} {b-7}* \frac{b-7}{b-3}= \frac{(b-3)^{2}} {b-7}* \frac{b-7}{b-3}=b-3$