What two numbers add together to equal 20 and multiply together to equal 36

Question

asked May 22, 2020 69.7k views

2 Answers

Rob Murphy · Answer 1 · 2020-05-26T13:24:48+0000

a)X + Y = 20

b) X * Y = 36

Isolate Y in a: X= 20 - Y

Plug into b: (20-Y) * Y=36

20 Y - Y^2 = 36

0 = Y^2 - 20Y + 36

0 = (Y -18)(Y-2)

Y-18= 0, Y=18

Y-2= 0, Y= 2

Final answer: 2 and 18

Hope it’s clear :)