When estimating a square root, how do you find the numerator in your fraction of your estimation?

To get your numerator you subtract the first two numbers, 63 - 49 = 14. That leaves you with 14 over 15 or . 93. Since the square root of 63 is higher than 7 but less than 8 your whole number is 7

one that is bigger than 3 1/2

80x^8−68x^6+16^5−20x^4−4x^3+8x^2

hope i'm right lol