A shopkeeper in Lucknow buys x kg of rice. He notices that x2 equals 9 times x. Which quadratic equation in standard form is this, and what non-zero value of x satisfies it?
Class 10Standard Form and RootsQuadratic Equations
A18
B10
C8
D9
Step-by-Step Solution
x2=9x gives x2−9x=0, so x(x−9)=0. The non-zero solution is x=9 kg.
Answer: D) 9
Master this chapter in 30 minutes a day.
Don't just memorise the answer — build a daily practice habit.