which of the following is the sum of both solutions of the equation x^2 + x -42 = 0?

Question

1.) 13

2.) -1

3.) -13

4.) 1

Answer 1

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Answer 2

x^2 +x -42 =0

(x+7)(x-6) = 0

x = 6, -7

sum = -1

2) -1 is the correct answer

Answer 3

which of the following is the sum of both solutions of the equation x^2 + x -42 = 0?

x² + x - 42 = 0

(x+7)(x-6) = 0 (factor because we know F-O-I-L)

Either x = -7 or x = 6

Sum of both solutions: (-7) + 6 = (-1)