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scZoUnD [109]
3 years ago
11

Product of (x+y+2)(y+1)

Mathematics
1 answer:
andre [41]3 years ago
6 0

Answer: x ( y + 1) + y ( y + 3) + 2

Step-by-step explanation:

( x + y + 2) ( y + 1)

x ( y + 1) + y ( y + 1) + 2 ( y + 1)

expanding the bracket

( xy + x) + ( y2 + y) + ( 2y + 2)

removing the bracket

xy + x + y2 +y + 2y + 2

collecting like terms

xy + x + y2 + 3y + 2

given as: x(y + 1) + y ( y + 3) + 2

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2 years ago
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andrey2020 [161]
A triangle can only have at most one right angle.

Here's a proof that shows why this is so:

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We cannot have an angle with 0 degrees in a triangle. Thus, it is impossible to have 2 right angles in a triangle.

Let's try to show that it's impossible to have 3 right angles

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