Question

100 POINT!!!!! NEED HELP ASAP Show that (a + bi)^2 = (a + b)(a − b) + 2abi

Answer 1

Answer:

Step-by-step explanation:

(a + bi)^2 = (a + b)(a − b) + 2abi

= a² + (bi)² + 2 * a * bi

= a² + b²i² + 2abi

= as i² = -1

= a² - b² + 2abi

= (a + b) (a - b) + 2abi