Solve x2 + 2x =1 for x by completing the square.

Each morning papa notes the birds feeding on his bird feeder. so far this month he has see. 59 blue jays, 68 black crows, 12 red robin's and 1 cardinal. what is the probability of a blue jay being the next bird papa sees

How do i do this? i don’t understand

If you have 12 feet of string and you cut it into equal length of 5 inches each how much string will be left