You switch the numbers to 6 plus four, because it's the same thing. So, positive 6 minus negative 4 is 10.
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if a positive number minus a negative number, the minus turns to a plus sign. so its positive Ex. 2- -4= 2+4=6
negative read this : "MULTIPLICATION: minus times minus is plus (negative x negative = positive).....minus times plus is minus (negative x positive = negative).....plus times plus is plus (positive x positive = positive) DIVISION: minus divi minus is plus (negative ÷ negative = positive)......minus divi plus is minus (negative ÷ positive = negative).....plus divi plus is plus (positive ÷ positive = positive)"
6
It's makes positive because positive is stronger than negative. Negative and negative is positive.
3c(squared)-17c-6 = 0 (3c+1)(c-6) = 0 c= negative one third or positive 6