Question

what is a number where the square of itself is 195 more than twice the number

Answer 1

x^2 = 195 +2 x
x^2 - 2 x - 195 = 0
195/15 = 13 good
(x-15)(x+13) = 0
x = 15

check
225 = 195 + 30?
yes

Answer 2

What two whole numbers is the following square root between?



latex-723f6a4653f952ed15c843111439eb50_5b7f0d74768df.png

a
12-13
b
13-14
c
14-15
d
15-16