How do you factorise x squared minus 49?

Math what information is needed to draw a straight line? What is the LCM of 125 240 305? What is 7.86 times 10 to the sixteenth power? How many times does the word 'Devil' appear in bible? What two major inventions helped to advanced Portuguese navigation in the second half of the 1400s? What does interpret with remainder mean? What is the circumference of a 7 feet diameter? How long is 75 feet? What is the sum of the angles of a circle? Where is an index in a radical? How many miles are in 60 minutes? How do you draw a continuous linear decreasing function? What is the volume of a rectangular prism of 2 ft x 3 ft x 5 ft? How do you write 15.7 percent as a decimal? What number is shown with the blocks write the number? What does 1 over 3 equal to? How many times is the phrase 'be careful' in the Bible? What is an 7-sided shape? Is line reflection a direct isometry? 3 pounds 7 ounces equals how much ounces?