5 sq rt of 2
It is + or - 2*sqrt(24).
sq rt (-2) + (sq rt 3))2 + (-2)2= i(sq rt 2) + 7 = 7 + i(sq rt 2) answerthis is a complex number, it cannot be further simplified.
120
-81
sq rt(49) xa4= 7a4
The numbers are: (-14 +sq rt 190) and (-14 -sq rt 190) Check: (-14 +sq rt 190)+(-14 -sq rt 190) = -28 and (-14 +sq rt 190)*(-14 -sq rt 190) = 6
98
The numbers are: -2 +2*sq rt 19 and -2 -2*sq rt 19 Check: (-2 +2*sq rt 19)*(-2 -2*sq rt 19) = -72 and (-2 +2*sq rt 19)+(-2 -2*sq rt 19) = -4
-454
It is: cos(15) = (sq rt of 6+sq rt of 2)/4
sq rt of 81 is 9 sq rt of 100 is 10 sq rt of 83 is between 9 and 10 and thus is not an integer/ counting number