Explanation for Question 4 From the Math (No Calc) Section on the 2017 April Sat
Question four asks which of the following list, 2 all solutions to the quadratic equation above. 3 So to find the solutions, I'm just going to start by factoring out. 4 The left side of this equation is becomes X squared. 5 Plus two X is equal to eight, 6 and then I'm going to move everything to the left side of the equation 7 by subtracting eight, from both sides to get X squared plus two X 8 plus negative eight is equal to zero. 9 Then I can factor this, this factors into X plus four 10 times X minus two, which tells us that X is equal to negative four 11 and X is equal to positive two, 12 which means that the correct answer is C negative four and two.