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Mathematics 20 Online
Allison:

Find x

Allison:

1 attachment
Allison:

@AZ

AZ:

|dw:1618251183274:dw| The same formula

AZ:

4 * (4+x) = 2 * (2 + 14) x = ?

Allison:

4

AZ:

That is correct!

Allison:

1 attachment
AZ:

This is a tangent-secant

1 attachment
AZ:

|dw:1618251758716:dw|

Allison:

4^2 = x (x+32)

AZ:

nope nope look again

AZ:

the tangent side is 'a' which is 'x' in your question 4 and 32 are the secant segment

Allison:

x^2= 4(4+32)

AZ:

there you go!

Allison:

12?

AZ:

Bingo! although do keep in mind that when you do a square root, you get a plus or minus so +12 and -12 but we know that the length cannot be negative so +12 is the only answer

Allison:

Okie dokie

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