Simplify (x+3)(x-1) - x(x+2)
2 answers:
Answer:
Step-by-step explanation:
<em>Hey there!</em>
Well to simplify,
(x+3)(x-1) - x(x+2)
we need to do
(x+3)(x-1) first,
(x+3)(x-1)
x*x = x^2
-x + 3x = 2x
-1 * 3 = -3
Now we can do,
x(x+2)
x*x = x^2
x*2 = 2x
So now we need to subtract the 2 products,
x^2 - x^2 = 0
2x - 2x = 0
The answer is,
<em>Hope this helps :)</em>
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Answer:
No, it is not a square
Step-by-step explanation:
If one wall is 19", that would mean the wall perpendicular to this wall is also 19" (in fact all of the walls would be 19"!) If this was a square, then the diagonal we draw at 20.62" would serve as the hypotenuse of a right triangle. One wall would serve as a leg, and another wall as another leg. If this is a square, then the Pythagorean's Theorem would be satisfied when we plug in the 2 wall measures for a and b, and the diagonal for c:
We need to see if this is a true statement. If the left side equals the right side, then the 2 legs of the right triangle are the same length, and the room, then is a square.
361 + 361 = 425.1844
Is this true? Does 722 = 425.1844? Definitely not. That means that the room is not a square.