They are 21 and -21.
21 equals dots on a dice
28*21 equals 84
21
5q-29 equals 21 5q equals 50 q = 5
21
21 feet equals 6.4008 metres.
3 and 7 multiplies to 21 and equals to 10
How about: 1*21 = 21 or 3*7 = 21
No real roots. Imaginary roots as this function does not intersect the X axis.
It has two complex roots.
The roots are -3 and -7. Easily by factoring and setting each factor equal to 0. The factors are x + 7 and x +3.