"7 = 5 x 2" is a false statement under standard arithmetic rules.
-2
12 + 5 equals...
(3*5)+(6 to the power of 2)+54-5
3*6*2+5+5+54=100
X2 (5)2 = 25 (- 5)2 = 25 An identity, almost, as any number put into this expression will yield the same value.
the expression is: 1^2=1 2^2+(2-1)^2=5 3^2+(3-1)^2+(3-2)^2=14
explain how to evaluate an algebraic expression for given variables. how would we evaluate the expression "3x-4y+9" when x=2and y=5?
-2
(3 * 3)(2 * 5) (9)(10) 90
5(5) is 25. 3(-2) is (-6). The expression becomes 25 - (-6). When subtracting a negative number, you actually "add the opposite," so the expression is now 25 + 6 (positive 6 is "the opposite" of -6); the value is 31.
-3
12 + 5 equals...
(3*5)+(6 to the power of 2)+54-5
3*6*2+5+5+54=100
you test it by giving the letters a value say if X equals 5 and Y equals 7 then you calculate both expressions with that value. If both answers are the same, then the simplified expression is correct, or an equivalent.
X2 (5)2 = 25 (- 5)2 = 25 An identity, almost, as any number put into this expression will yield the same value.
-3 + 5 = 2 This is the same as 5-3 = 2.