How do you factorise x squared minus 49?

How many lin ft in a 1in x6 in -12 ft? If the area of a square is 64 square centimeters what's the length of one side? What is the slope of the line 3x minus 2y plus 12 equals 0? What are the first fourteen counting numerals in base 10? What is 2 3rd of 30? How can you make 4 with two 2s? How many decimals are there in 4000 sqft? Does a comma always go before and in a series? 25 - 5 plus 2? What is 4.5 times 0.5? Two thousand seventy one million nine hundred thousand? What is the reduce fraction of 4 over 5? What is the formula for finding trapezoid? How many square meters in room 240 x 280 x 240 x 280cm? What are the Hindu Arabic numerals? What is the angle between the clock hands at 520? What best describes the relationship between (x-5) and the polynomial 2x2-7x-15? What is it called when you write quickly? What shows temperature on a climate graph? What equals 1372?