Search results
Results From The WOW.Com Content Network
Let ABC be a triangle with side lengths a, b, and c, with a 2 + b 2 = c 2. Construct a second triangle with sides of length a and b containing a right angle. By the Pythagorean theorem, it follows that the hypotenuse of this triangle has length c = √ a 2 + b 2, the same as the hypotenuse of the first triangle.
The quadratic formula is exactly correct when performed using the idealized arithmetic of real numbers, but when approximate arithmetic is used instead, for example pen-and-paper arithmetic carried out to a fixed number of decimal places or the floating-point binary arithmetic available on computers, the limitations of the number representation ...
If c = p e is a prime power, there exists a primitive Pythagorean triple a 2 + b 2 = c 2 if and only if the prime p has the form 4n + 1; this triple is unique up to the exchange of a and b. More generally, a positive integer c is the hypotenuse of a primitive Pythagorean triple if and only if each prime factor of c is congruent to 1 modulo 4 ...
Diagram to explain Garfield's proof of the Pythagorean theorem In the figure, A B C {\displaystyle ABC} is a right-angled triangle with right angle at C {\displaystyle C} . The side-lengths of the triangle are a , b , c {\displaystyle a,b,c} .
Animation depicting the process of completing the square. (Details, animated GIF version)In elementary algebra, completing the square is a technique for converting a quadratic polynomial of the form + + to the form + for some values of and . [1]
In this context, the quadratic formula is not completely stable. This occurs when the roots have different order of magnitude, or, equivalently, when b 2 and b 2 − 4ac are close in magnitude. In this case, the subtraction of two nearly equal numbers will cause loss of significance or catastrophic cancellation in the smaller root.
A root system which does not arise from such a combination, such as the systems A 2, B 2, and G 2 pictured to the right, is said to be irreducible. Two root systems ( E 1 , Φ 1 ) and ( E 2 , Φ 2 ) are called isomorphic if there is an invertible linear transformation E 1 → E 2 which sends Φ 1 to Φ 2 such that for each pair of roots, the ...
The oxygen atomic orbitals are labeled according to their symmetry as a 1 for the 2s orbital and b 1 (2p x), b 2 (2p y) and a 1 (2p z) for the three 2p orbitals. The two hydrogen 1s orbitals are premixed to form a 1 (σ) and b 2 (σ*) MO. Mixing takes place between same-symmetry orbitals of comparable energy resulting a new set of MO's for water: