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how to subtract rational algebraic expression


Sagot :

to subtract rational algebraic expresaion , first look at the sign numbers then proceed to the rule of adding rational algebraic expression
ex.8x²+12x+20 first is the lower is change the sign of the constant after that add it.
  -  5x²-8x+12  = 8x²+12x+20
                    (+) -5x²+8x-12
                     =   3x²+20x+8 the answer I think so