12
+4
+8
24
-2
22
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12 - 3 + (4 x 2) = 17
It is plus 4
x2_12x-3 = 0 Using the formula for solving quadratics: x = 12 plus/minus sqrt (144 - (4 x 1 x -3))/2 x = 12 plus/minus (sqrt 156)/2 x = 12 + (sqrt 156)/2 = 12.25 or x = 12 - (sqrt 156)/2 = -0.25
Positive 3 plus negative 5 minus negative 2 minus positive 4 is equal to -4.
-2 times -2 = plus 4 since minus times minus is plus