Exam Maths Puzzle Numerical Ability Quadratic Equations

Solve this
x^2+y^2+z^2=? If x+y+z=0

Read Solution (Total 1)

given, x+y+z=0

squaring both sides
(x+y+z)^2 = 0
=> x^2+y^2+z^2+2(xy+yz+zx)= 0
=> x^2+y^2+z^2 = -2(xy+yz+zx)
10 years agoHelpfull: Yes(0) No(0)

Exam Other Question

If v, w, x, y and z are non negative integers, each less than 11, then how many distinct combination of (v,w,x,y,z) satisfy
v(11^4)+w(11^3)+x(11^2)+y(11)+z = 151001
Option
a) 0
b) 1
c) 2
d) 3 Integration
dx/(sin^3 x + cos^3 x)