Finding Value of an Expression
Finding The Value of an Expression
The value of an algebraic expression depends on the values of the variables forming the expression.There are a number of situation in which we need to find the value of an expression, such as when we wish to check whether a particular value of a variable satisfies a given equation or not.
We find values of expressions, also, when we use formulas from geometry and form everyday mathematics.
Illustration: Find the value of the expression x+ 4 when x=2.
Solution: Putting x=2 In x+4,
we get the value of x+4 = 2 + 4 = 6
Illustration: Find the value of the expression 4x - 3 when x= 2
Solution Putting x = 2 In 4x - 3,
We get the value of 4x-3 = 4 X 2 - 3 = 8 - 3 = 5
If the volume of a rectangular prism V = lwh and surface area = 2 (lw) + 2(hw) + 2(lh), where l = length, h = height and w = width, then what is greater, if length = 8 cm, width = 10 cm and height = 6 cm ? | |||
| Right Option : A | |||
| View Explanation | |||
Find the value of the following expressions when a =3, b = 2 | |||
| Right Option : A | |||
| View Explanation | |||
if x=4 and y=-3, then | |||
| Right Option : A | |||
| View Explanation | |||
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