Question

Which of the following is a valid conclusion for the problem x2 + 6x + 8 = 0?

Answer 1

x = -2 or x = -4

Explanation:

Step 1 : Middle term break

x^2 + 6x + 8 = 0

x^2 + 4x + 2x + 8 = 0 (4+2 is equal to six and 4x2 is equal to 8)

x(x + 4) + 2(x +4)

(x+2) (x+4)

x= -2 or x= -4

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