PUMPA - SMART LEARNING
எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்
Book Free DemoSo far, in algebra, we have learnt about coefficients, constants, variables and expressions.
Let us recall them.
What are variables?
Variables is a letter that is used to represent the value of an unknown number. That is, the value of the unknown number does not remain the same.
Example:
\(x\), \(y\), \(a\), \(l\), … etc are variables.
What are constants?
A constant is a number whose value does not change (remains the same).
Example:
\(2\), \(1\), \(5\), \(71\), … etc are constants.
What are coefficients?
A coefficient is a number which is generally multiplied with a variable.
Example:
\(3x\) where \(3\) is the coefficient of \(x\).
What are algebraic expressions?
An algebraic expression is a group of variables, constants and coefficients which are separated by arithmetic operators (plus, minus, multiplication and division).
Example:
\(4x +3y +8\), \(12x^2 - 3xy + 10\) are algebraic expressions.
Framing algebraic expressions:
Let us learn how to frame an algebraic expression from the given statement.
Let us consider the examples.
Operations | Statement | Algebraic expression |
Addition | The sum of \(5\) and \(y\) | \(5 + y\) |
Subtraction | The number \(8\) is less than \(p\) | \(p - 8\) |
Multiplication | The number \(7\) is subtracted from \(5\) times \(x\) | \(5x - 7\) |
Division | The number \(10\) divided by \(l\) | \(\frac{10}{l}\) |