What is the sum of two numbers that add up to 17 and their product is 70

Answer 1

x y = 70
y = 17 - x

x (17-x) = 70
-x^2 + 17 x -70 = 0
x^2 - 17 x + 70 = 0
x = [ 17 +/- sqrt (289 - 280) ] / 2
x= [ 17 +/- 3 ] / 2
x = 10 or 7
so try 10 and 7