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Mathematics and Statistics Assessment Videos 200 videos

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Which of the following points is a location where the function f(x) = -2x² + 12x + 54 crosses the horizontal axis?

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TSI Math: Finding the Area of a Square 3 Views


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Description:

A square measures 12 units diagonally from corner to corner. What is its area?


Transcript

00:03

All right same ash jumpers Here we go Square measures

00:07

twelve units diagonally from corner to corner What is its

00:11

area All right so it's a square We're told that

00:16

and remember the jaggery and they're um they're going to

00:19

create a triangle and then we'll get a squared plus

00:21

b squared c squared We know c square Do we

00:24

know a equals b right So well there's Only one

00:27

measurement we care about when it comes to the area

00:30

of squares It's the length of the squares side right

00:33

Because that's what gives us the area label side length

00:37

x and the dagnall square is the high pot news

00:39

of an exhaust elise right triangle with both legs of

00:42

length x so we can use the pythagorean theorem here

00:44

to find axe And we've got you know x squared

00:47

plus x squared is well twelve squared right A squared

00:50

plus b squared is inscribed Just simplify both sides We

00:52

had two ex words one forty four and divide out

00:55

two and we've got that seventy two So we want

00:59

the square root of seventeen to here right Well no

01:02

need to worry about that If we had acts while

01:04

we would just square it again So the area of

01:07

the square is x squared which we've discovered is seventy

01:11

two Right square to seventy two squared is seventy two

01:14

least in texas So the square has an area of

01:16

seventy two square units The answer is a and war 00:01:18.943 --> [endTime] shmoop Oh

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