book Maths Puzzle Numerical Ability

please help me with this problem.

Solve the equation.

21n^2 + 63n = 0

Read Solution (Total 0)

book Other Question

In which of the following is y a function of x

a. 3y+2x-9=0
b. x+y^2=5
c. x^2+y^2=25
d. noone of these Two travelers are 220 kilometers apart at noon and are headed toward each other along a straight road. They meet at 5:30 P.M., and one traveled 20 kilometers per hour faster than t