You must remember that a polynomial is written like so...
ax^2 + bx + c
In this case...
a = 1
b = 10
c = 21
To factor you must find two numbers who both add up to b (10) AND multiply to c (21)
3 + 7 = 10
3 * 7 = 21
so...
(x + 3 )(x + 7)
Hope this helped!
~Just a girl in love with Shawn Mendes
Dear Pleaseanswerback, the value of 6 in 26.495 is greater than the 6 in 17.64 because the 6 in 26.495 is 6, and the 6 in 17.64 is 0.6. 6 is greater than 0.6 so the value of 6 in 26.495 is greater.