Question 359883
{{{x(x+2) = 80}}},
{{{x^2 + 2x = 80}}},
{{{x^2 +2x - 80 = 0}}},
{{{(x+10)(x-8) = 0}}},
Then x = -10 or x = 8.
The two pairs of numbers are -10, -8 or 8, 10.