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Why negative times negative is equal to positive?
Using the distributive property of multiplication over addition, x*[x - x] = x*[x + (-x)] = x*x + x*(-x)LHS = x*0 = 0RHS = x^2 + x*(-x)Therefore x*(-x) = -x^2 and, by commutativity, -x*x = -x^2Next-x*[x - x] = -x*[x + (-x)] = -x*x + -x*(-x)LHS = -x*0 = 0RHS = -x^2 + -x*(-x)Therefore (RHS) -x times -x = +x^2 (LHS).
What are all the factor strings of 720?
2 x 360 3 x 240 4 x 180 5 x 144 6 x 120 8 x 90 9 x 80 10 x 72 12 x 60 15 x 48 16 x 45 18 x 40 20 x 36 24 x 30 2 x 2 x 180 2 x 3 x 120 2 x 5 x 72 3 x 3 x 80 3 x 5 x 48 2 x 2 x 2 x 90 2 x 2 x 3 x 60 2 x 2 x 5 x 36 2 x 3 x 5 x 24 3 x 3 x 5 x 15 2 x 3 x 3 x 40 2 x 2 x 2 x 2 x 45 2 x 2 x 2 x 3 x 30 2 x 2 x 2 x 5 x 18 2 x 2 x 3 x 3 x 20 2 x 2 x 3 x 5 x 12 2 x 3 x 3 x 5 x 8 2 x 2 x 2 x 2 x 3 x 15 2 x 2 x 2 x 2 x 5 x 9 2 x 2 x 3 x 3 x 4 x 5 2 x 2 x 2 x 2 x 3 x 3 x 5
What is a 5 factor string for 720?
2 x 360 3 x 240 4 x 180 5 x 144 6 x 120 8 x 90 9 x 80 10 x 72 12 x 60 15 x 48 16 x 45 18 x 40 20 x 36 24 x 30 2 x 2 x 180 2 x 3 x 120 2 x 5 x 72 3 x 3 x 80 3 x 5 x 48 2 x 2 x 2 x 90 2 x 2 x 3 x 60 2 x 2 x 5 x 36 2 x 3 x 5 x 24 3 x 3 x 5 x 15 2 x 3 x 3 x 40 2 x 2 x 2 x 2 x 45 2 x 2 x 2 x 3 x 30 2 x 2 x 2 x 5 x 18 2 x 2 x 3 x 3 x 20 2 x 2 x 3 x 5 x 12 2 x 3 x 3 x 5 x 8 2 x 2 x 2 x 2 x 3 x 15 2 x 2 x 2 x 2 x 5 x 9 2 x 2 x 3 x 3 x 4 x 5 2 x 2 x 2 x 2 x 3 x 3 x 5
How do you place 10 pennies in 5 rows?
Put two in each row. X X X X X X X X X X
What are the string factors of 360 roe two factors three factors and four factors?
180 x 2 120 x 3 90 x 4 72 x 5 60 x 6 45 x 8 40 x 9 36 x 10 30 x 12 24 x 15 20 x 18 2 x 2 x 90 2 x 3 x 60 3 x 3 x 40 2 x 5 x 36 2 x 6 x 30 3 x 5 x 24 3 x 6 x 20 4 x 5 x 18 2 x 9 x 20 2 x 10 x 18 4 x 6 x 15 2 x 2 x 2 x 45 2 x 2 x 3 x 30 2 x 3 x 3 x 20 2 x 3 x 5 x 12 2 x 2 x 6 x 15 3 x 4 x 5 x 6 2 x 3 x 6 x 10 2 x 2 x 5 x 18 2 x 2 x 9 x 10 2 x 3 x 4 x 15 2 x 2 x 2 x 3 x 3 x 5 There are more...
