Equation: s^2 +4x -21 = 0
Completing the square: (s+2)^2 -4 -21 = 0 => (s+2)^2 = 25
Square root both sides: s+2 = +5 or -5
Subtract 2 from both sides: s = 3 or s = -7
square root -5 minus 14 or - square root -5 minus 14
4
The answer is 4, as 629 minus 4 equals 625. 625 is 25 squared.
5 squared is 25 4 squared is 16 25-16= 9 the square root of 9 is 3.
x = plus or minus 6.
4 squared minus 2 squared equals 12
square root of 8
B squared equals c squared minus a squared then to find B take the square root of you answer for b squared
If x squared -10 = 0 then x = the square root of 10
sqrt(4a2) = 21plus or minus (2a) = 21plus or minus (a) = 10.5a = +10.5a = -10.5
Yes and x = 2+square root of 6 or x = 2-square root of 6
x equals negative b plus or minus the square root of b squared minus 4bc over 2a
2
The square root of 28 minus the squared root of 7 =±2.64575131
square root -5 minus 14 or - square root -5 minus 14
It is: 9-4 = 5
a2 + 62 = 122 a2 + 62 - 62 = 122 - 62 a2 = 144 - 36 a2 = 108 taking the square root of each side, we get a equal plus or minus the square root of 108, or plus or minus 6 times the square root of 3.