The value of the expression 3x² - 2xy + 4y² will be 12.
What is an expression?
Expression in maths is defined as the collection of the numbers variables and functions by using signs like addition, subtraction, multiplication, and division.
Numbers (constants), variables, operations, functions, brackets, punctuation, and grouping can all be represented by mathematical symbols, which can also be used to indicate the logical syntax's order of operations and other features.
The given expression will be calculated as below:-
3x² - 2xy + 4y²
Substitute x = -2 and y = -1 in the expression above. Let the expression is termed as E.
E = 3(-2)² - 2(-2)(-1) + 4(-1)²
E = 3(4) - 2(2) + 4(1)
E = 12 - 4 + 4
E = 12
Therefore, the value of the expression 3x² - 2xy + 4y² will be 12.
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