What is the solution to the equation 9x - 1 = 80. X = -9 X = 1 x = 81 x=9
2 answers:
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if you meant x^2+9x+20 then it is (x+4)(x+5) you know that because 4+5=9 and 4x5=20 using FOIL
if you meant x^2+9x+20 then it is (x+4)(x+5) you know that because 4+5=9 and 4x5=20 using FOIL