What is the modulus of the complex number $(1+2i)(-2+i)$?
- A$\sqrt{5}$
- B$5$
- C$5\sqrt{5}$
- D$\sqrt{35}$
Explore More
Similar Questions
If $(\sqrt{8} + i)^{50} = 3^{49}(a + ib)$,then $a^2 + b^2$ is
Medium
View SolutionThe Cartesian form of the complex number $z = 4(\cos 300^{\circ} + i \sin 300^{\circ})$ is
If $z=x+iy$ satisfies the equation $z^2+az+a^2=0$,where $a \in R$,then:
If $\alpha$ and $\beta$ are different complex numbers with $|\beta|=1,$ then find $\left|\frac{\beta-\alpha}{1-\bar{\alpha} \beta}\right|.$
Difficult
View SolutionLet $z = a - \frac{i}{2}$,where $a \in R$. Then $|i + z|^2 - |i - z|^2$ is equal to
Vedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See Demo