x^2 - 7
Subject: Algebra Topic: Expression Evaluation Step 1: Let the number be represented by the variable ( x ). Step 2: Write the expression for "a square of a number": ( x^2 ). Step 3: Write the expression for "3 less than a square of a number": ( x^2 - 3 ). Step 4: Provide the final answer: The expression representing "3 less than a square of a number" is ( x^2 - 3 ). Explanation: The expression ( x^2 - 3 ) represents the result of subtracting 3 from the square of a given number ( x ).
Subtract 25 from whatever variable you use for "a number". If your number is "x", then the expression becomes "x - 25".
( n - 16 )
As an algebraic expression it is: 2x-9
x-2
3n-30
2x^2 - 1
x + (13-10)
x4 - 3
Let the number be x and so the expression is: 4x -7
9b2-7
n*5 - 6