Pls Answer 1. Show that (a+bi)^2 = (a+b)(a−b) + 2abi

2. Show that (2x+i)(2x−i) = 4x2 +1

3. Show that (1+i)2 = 2i

1. how do you convert the repeating, nonterminating decimal 0. to a fraction? explain the process as you solve the problem.

Triangle abc has side lengths: ab = 3.5  cm, bc = 2.4 cm, and ac = 4.2 cmδabc ≅ δhjkwhat is the length of side hj?

20 points for the answer. this is for real , don't put random ! a rectangle has a length of 4 centimeters and a width of 7 centimeters. what is the effect on the perimeter when the dimensions are multiplied by 5? the perimeter is increased by a factor of 5. the perimeter is increased by a factor of 20. the perimeter is increased by a factor of 25. the perimeter is increased by a factor of 100.