Answer:
2x + 8
Step-by-step explanation:
(4x + 5) - (2x - 3)
4x + 5 - 2x + 3
2x + 8
Solution:
<u>We know that:</u>
- Diameter = 22 meters
- Radius = Diameter/2
- Area of circle = πr²
<u>Finding the radius:</u>
- Radius = Diameter/2
- => Radius = 22/2
- => Radius = 11 meters
<u>Finding the area of the circle:</u>
- Area of circle = πr²
- => Area of circle = (3.14)(11²)
- => Area of circle = 3.14 x 121
- => Area of circle = 379.94 m²
Answer:
B)
Step-by-step explanation:
(2x^3+x^2-4x)-(9x^3-3x^2)
2x^3-9x^3+x^2-(-3x^2)-4x
-7x^3+x^2+3x^2-4x
-7x^3+4x^2-4x
X^2 - y^2 = a
2xy = b
x^2 + y^2 = c
A polynomial identity is an equation that is always true.`1
You can relate x^2 + y^2 with x^2 - y^2 and 2xy in this ways.
1) Step 1:
[x^2 + y^2]^2 = x^4 + 2(xy)^2 + y^4 = c^2
2) Step 2:
[x^2 - y^2] = x^4 - 2(xy)^2 + y^2 = a^2
(2xy)^2 = 4(xy)^2 = b^2
x^4 - 2(xy)^2 + y^2 + (2xy)^2 = x^4 + 2(xy)^2 + y^2
------------------------ ---------- --------------------------
↓ ↓ ↓
a^2 b^2 = c^2
Answer: the identity is
c^2 = a^2 + b^2 equivalent to
(x^2 + y^2)^2 = (x^2 - y^2)^2 + (2xy)^2
Answer:
x =65
Step-by-step explanation:
You see it is very hard
