Use vertical multiplication to find the product of:

Step-by-step explanation:

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First step multiply your terms in your first expression just to the 1 in the second expression like so:

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 Anything times 1 is that anything.

That is, .

Now we are going to take the top expression and multiply it to the -x in the second expression. .  We are going to put this product right under our previous product.

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We still have one more multiplication but before we do that I'm going to put some 0 place holders in and get my like terms lined up for the later addition:

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Now for the last multiplication, we are going to take the top expression and multiply it to x^3 giving us . (I'm going to put this product underneath our other 2 products):

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I'm going to again insert some zero placeholders to help me line up my like terms for the addition.

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----------------------------------------------------Adding the three products!

c.   x=2.4cm

step-by-step explanation:

similar triangles are triangles which have the same shape but not the same size. this means their angle measures are equal but their side lengths are not instead they are proportional. to solve, we will set up a proportion and solve.

a proportion is two equal ratios set equal to each other. we form the ratios by finding corresponding sides (sides which match to each other on both triangles by their position). out ratios will be one side of the small triangle over the corresponding side on the big triangle as shown below:

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to solve the proportion, we'll cross multiply by multiplying numerator with denominator across the equal sign.