Question

若绝对值a减2与b加3括号的平方互为相反数,则b的值为多少

Answer 1

|a-2|+(b+3)^2=0

∵|a-2|≥0,(b+3)^2|≥0

∴a-2=0,b+3=0

a=2,b=-3

b^a=(-3)^2=9