We are given the expression n² -3n + 8 and told "What if n = 4?"
To answer it, we put 4 in every place we see n.
n² - 3n + 8
(4)² - 3(4) + 8 <----- put 4 in all the places you see n
16 - 3(4) + 8 <------- order of operations/PEMDAS, exponents first
16 - 12 + 8 <-------multiply before adding
4 + 8 <-------add / subtract left to right
12
Thus if n = 4, then the expression evaluates to 12.
An expression is defined as a set of numbers, variables, and mathematical operations. The value of the given expression n²-3n+8 when the value of n is 4 is 12.
In mathematics, an expression is defined as a set of numbers, variables, and mathematical operations formed according to rules dependent on the context.
The value of the given expression n²-3n+8 when the value of n is 4, can be found by substituting the value of n as 4 in the given expression.
Therefore, The value of the given expression n²-3n+8 when the value of n is 4 is,
n² - 3n + 8
= (4)² - 3(4) + 8
= 16 - 12 + 8
= 12
Hence, The value of the given expression n²-3n+8 when the value of n is 4 is 12.
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