how to solve this example 4 a and b??

chingying

peaceboy

回复 1# chingying


let (a+b)^2 = 37 + 20(3)^(1/2) , a,b>0

a^2 + b^2 + 2ab = 37 + 20(3)^(1/2)
by comparison
a^2 + b^2= 37 ---1
2ab =  20(3)^(1/2) ---2

然后自己来，不能factorize 就用quadratic formula

chingying

真的非常感谢你！！！！
谢谢！！