Can someone show me a step by step of how a²+b² = (a+b)²-2ab ?

How does a low unemployment rate affect a nation's economy? a. the nation has a higher number of productive resources. b. the nation can spend more money on for unemployed people. c. the nation can save money by paying lower salaries to a large workforce. reset

Gh bisects fgi. find the measure of hgi •15° •21° •10° •8°

Ab and bc are tangent to circle d. find x is ab = 3x + 8 and bc = 26. find x