Question

find the value of a and b where a+b= 8 and ab=15

Answer 1

a+b=8 and ab=15 Therefore (a-b)^2=(a+b)^2-4ab (a-b)^2=64-60 (a-b)^2=4 a-b=2 a+b=8 a-b=2 a=5 b=3