Question

i need help finding the product of rational expressions.

Answer 1

post a specific question

Answer 2

2a/-7b*-7a/6

Answer 3

\[ \frac{2a}{-7b} \cdot \frac{-7a}{6} \]

the "simple" rule is top * top and bottom*bottom

if we do that, but do not simplify, we get
\[ \frac{2\cdot a \cdot -7 \cdot a }{-7\cdot b\cdot 6} \]
notice we have things multiplied up top (and in the bottom) , and we can change the order of multiplying . So we could write it as
\[ \frac{-7 \cdot2\cdot a \cdot a }{-7\cdot 6 \cdot b} \]
notice we have a -7 divided by -7, (which is 1, and when multiplying by 1, we can ignore it)
so
\[ \frac{2\cdot a \cdot a }{6 \cdot b} \]

notice that the "short way" to write a*a is a^2
also, we usually leave out the multiply signs:
\[ \frac{2a^2 }{6b} \]

Answer 4

thank you