Answer:
1
Step-by-step explanation:
Look at the LHS: you have the square of x, then you have 2 times x, times -1. to complete a square you just need to add the square of -1, that is 1. That becomes

Answer:
a number
Step-by-step explanation:
Answer:
21 is 84% to 25, so there would be 25 total questions on the test