What is algebra?
Algebra is a mathematical branch that uses letters and symbols to present numbers and values.
(Answer: 3)
Unknown numbers can be found in algebra, just like when solving secrets! left?
Answer: x -2
Use x to indicate that the number of sweets can be numbered. variable.
Constants:
Constants are fixed numbers that are unchanged.
Example:
In x + 3, number 3 is a constant. +, raw・
Coefficient.
Example:
3x liters, the coefficient for x is 3
5y, the coefficient is 5
Example:
x + 2 = 5
This is the equation “Which number and 2 give 5?”
Step-by-step example:
solve: x4= 6
1. Add 4 on each side 4 + 4 = 6 + 4
2. Subtracting Algebraic Expressions
Add or subtract algebraic expressions that combine similar terms. 8x
Example:
6y2y= 4y
TIP: Combine only the same terms! variable. 3y
These are always true formulas.
Some basic identities:
(a + b)²=a² + 2ab +b²
Problem: Wenn Sara X -Prinen Hat and Sie 5 Weitere Kauft, Gibt Sie Ihrem Freund 3, Wie Viele Pralinen Hat Sie Jetzt?
Trick Frdinder
variblen sind wie mysterious-nummern (wir verwenden x, y, a, b)
Konstanten sind feste Zahlen ( 5, 10, 100)
Expression
Reality Use of Algebra
Understanding costs while shopping
Building and Game Design
