Question

已知a的绝对值=2-根号2,b的绝对值=3-2倍根号2 ,求a、b的和

Answer 1

a,b为正数时a+b=2-根号2+3-2根号2= 5-3根号2
a,b为负数时a+b=根号2-2+2根号2-3= 3根号2-5
a正b负时 a+b=2-根号2+2根号2-3= 根号2-1
a负b正时 a+b=根号2-2+3-2根号2= 1-根号2
四个答案都写

Answer 2

a+b=2-√2+3-2√2=5-3√2
=2-√2+2√2-3=√2-1
=√2-2+3-2√2=1-√2
=√2-2+2√2-3=3√2-5