Home › Karnataka SSLC (Class 10) › Mathematics › Quadratic Equations › The roots of $2x^2 - 4x = 0$ are
The roots of $2x^2 - 4x = 0$ are
A0 and 4
B0 and 2
C2 and 4
D1 and 2
Answer & Solution
Correct answer: B. 0 and 2
1. Take out the common factor: $2x(x-2)=0$.
2. So $2x=0$ or $x-2=0$, giving $x=0$ or $x=2$.
3. The roots are 0 and 2.
_Source: Karnataka SSLC (KSEEB) Class 10 Mathematics, Ch10 'Quadratic Equations', §10.2_
Related questions
The Square Root Property is described as applying to quadratic equations written in which Factoring fails to solve a quadratic directly when the equation has not first been arrangeA parabola whose equation has a negative squared term has a vertex that is its:An equation whose discriminant is negative has how many real solutions?A quadratic with a perfect square solved by the quadratic formula gives how many solutionsCompleting the square relies on the principle that in solving equations you must always:To use completing the square, an equation must first be put into:The Zero Product Property cannot be used when the right side of the equation is: