Q. Multiply. Write your answer in simplest form.5k4k−3×(k2−1)
Write Problem: Write down the given problem.We are given the expression (5k4k−3)×(k2−1).
Factor Second Expression: Factor the second expression if possible.The second expression (k2−1) is a difference of squares and can be factored into (k+1)(k−1).
Rewrite with Factored Form: Rewrite the expression with the factored form.The expression now looks like (4k−3)/(5k)×(k+1)(k−1).
Multiply Numerators and Denominators: Multiply the numerators and denominators.When multiplying fractions, we multiply the numerators together and the denominators together. This gives us (4k−3)×(k+1)(k−1)/(5k).
Expand Numerator: Expand the numerator.We need to distribute (4k−3) across (k+1)(k−1). First, multiply (k+1)(k−1) to get k2−1. Then distribute: 4k(k2−1)−3(k2−1).
Perform Distribution: Perform the distribution.Calculate 4k(k2−1) which is 4k3−4k and −3(k2−1) which is −3k2+3. The expression becomes 4k3−4k−3k2+3.
Combine Like Terms: Combine like terms in the numerator.There are no like terms to combine in 4k3−4k−3k2+3. So the numerator remains the same.
Write Final Expression: Write the final expression.The final expression is (4k3−3k2−4k+3)/(5k).
More problems from Multiply and divide rational expressions