Answer:
117
u welcome
Step-by-step explanation:
Answer:
12.5
Step-by-step explanation:
4+21=25
25/2=12.5
Answer:
-9
Step-by-step explanation:
2(-x)² - 5 = 157
2x² - 5 = 157
add 5 to each side of the equation:
2x² = 162
divide both sides by 2:
x² = 81
√81 = 9 or -9
Answer:
REAL NUMBER - real number is union of rational and irrational numbers .... whole numbers, natural numbers, integers, rational and irrational numbers are included in real numbers.
INTEGER -. integer means
means whole - valued positive or negative number or 0......
suppose 1, 2, 3, -6, -2....
whole numbers, such as 3, 4, but not 3.6 or √4 .
I hope you understand the difference between real numbers and integers.......
Right triangles must follow the pythagorean theorem, so a^2+b^2=c^2.
Let's find a^2 and b^2 by squaring the first 2 side lengths.
(x^2-1)^2= x^4-2x^2+1
(2x)^2= 4x^2
Then add the two to find c^2
x^4+ 2x^2 +1= c^2
Root both sides
x^2+1=c
Since the side lengths can be plugged into the pythagorean theorem, the side lengths must represent a right triangle.
Hope this helps!
