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3 years ago

Help please, kind of confused

Mathematics

1 answer:

Anvisha [2.4K]3 years ago

3 0

Answer:

Step-by-step explanation:

Yikes. This is quite a doozy, so pay attention. We will begin by factoring by grouping. Group the first 2 terms together into a set of parenthesis, and likewise with the last 2 terms:

$(2d^4+6d^3)-(18d^2-54d)$ and factor out what's common in each set of parenthesis:

$2d^3(d+3)-18d(d+3)$ . Now you can what's common is the (d + 3), so factor that out now:

$(d+3)(2d^3-18d)$ BUT in that second set of parenthesis, we can still find things common in both terms, so we continue to factor that set of parenthesis, carrying with us the (d + 3):

$(d+3)2d(d^2-9)$ BUT that second set of parenthesis is the difference of perfect squares, so we continue factoring, carrying with us all the other stuff we have already factored:

$(d+3)2d(d+3)(d-3)$ . That's completely factored, but it's not completely simplified. Notice we have 2 terms that are identical: (d + 3):

$2d(d+3)^2(d-3)$ is the completely factored and simplified answer, choice 3)

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Answer:

Step-by-step explanation:

Alright, lets get started.

The given expression is :

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It could be written as

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So, replacing that in our expression

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