Answer:
A.
Step-by-step explanation:
An irrational number is a number that goes on forever without repeating. The square root of 2 does exactly this.
Answer:
No
Step-by-step explanation:
You can determine if a triangle is a right triangle using the Pythagorean theorem:
![a^2+b^2=c^2\\leg^2+leg^2=hypotenuse^2](https://tex.z-dn.net/?f=a%5E2%2Bb%5E2%3Dc%5E2%5C%5Cleg%5E2%2Bleg%5E2%3Dhypotenuse%5E2)
Insert the given values. In a right triangle, the hypotenuse will always be the longest side, so the greatest number is c:
![4^2+7^2=11^2](https://tex.z-dn.net/?f=4%5E2%2B7%5E2%3D11%5E2)
Simplify the exponents (x²=x·x):
![16+49=121](https://tex.z-dn.net/?f=16%2B49%3D121)
Simplify addition:
![65=121](https://tex.z-dn.net/?f=65%3D121)
Since the result is not true, the triangle is not a right triangle.
:Done
The answer might be 18x^2+19x+35
Answer:
x=0
Step-by-step explanation:
7x - 42x = 0
Combine like terms
-35x = 0
Divide each side by -35
-35x/-35 = 0/-35
x = 0
Answer:
The answer is (x-2)(x+1).
Step-by-step explanation:
You have to elaborate the expression :
![{x}^{2} - x - 2](https://tex.z-dn.net/?f=%20%7Bx%7D%5E%7B2%7D%20%20-%20x%20-%202)
![{x}^{2} + x - 2x - 2](https://tex.z-dn.net/?f=%20%7Bx%7D%5E%7B2%7D%20%20%20%2B%20%20x%20-%202x%20-%202)
Next you can take out the common terms(factorize) :
![{x}^{2} + x - 2x - 2](https://tex.z-dn.net/?f=%20%7Bx%7D%5E%7B2%7D%20%20%2B%20x%20-%202x%20-%202)
![x(x + 1) - 2(x + 1)](https://tex.z-dn.net/?f=x%28x%20%2B%201%29%20-%202%28x%20%2B%201%29)
![(x - 2)(x + 1)](https://tex.z-dn.net/?f=%28x%20-%202%29%28x%20%2B%201%29)