PROBLEM
Find (c⋅d)(x) for c(x)=4x−2 and d(x)=x2+5x.
STEP 1
Assumptions1. We have two functions, c(x)=4x− and d(x)=x+5x.
. We need to find the product of these two functions, denoted as (c⋅d)(x).
STEP 2
The product of two functions c(x) and d(x) is defined as (c⋅d)(x)=c(x)⋅d(x).
STEP 3
Substitute the given functions into the product.
(c⋅d)(x)=(x−2)⋅(x2+5x)
STEP 4
To multiply these two expressions, we use the distributive property of multiplication over addition, which states that a⋅(b+c)=a⋅b+a⋅c.
(c \cdot d)(x) =4x \cdot x^{2} +4x \cdotx -2 \cdot x^{2} -2 \cdotx
STEP 5
implify the above expression.
(c⋅d)(x)=4x3+20x2−2x2−10x
STEP 6
Combine like terms.
(c⋅d)(x)=4x3+(20x2−2x2)−10x
SOLUTION
Calculate the final expression.
(c⋅d)(x)=4x3+18x2−10xSo, (c⋅d)(x)=4x3+18x2−10x.
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