Question

how to earn free robux in roblox​

Answer 1

Explanation:

There is no such thing as a Robux Generator. If a person, website, or game tries to tell you there is one, this is a scam and should be reported via our Report Abuse system.

Answer 2

Explanation:

$\begin{aligned} & \vec{a} \neq \vec{o}, \vec{b} \neq \overrightarrow{0} \\ &(\vec{a}+\vec{b}) \cdot(\vec{a}+\vec{b})=|\vec{a}|^{2}+|\vec{b}|^{2} \\ & \Leftrightarrow \vec{a} \cdot(\vec{a}+\vec{b})+\vec{b} \cdot(\vec{a}+\vec{b})=|\vec{a}|^{2}+|\vec{b}|^{2} \\ & \Leftrightarrow \vec{a} \cdot \vec{a}+\vec{a} \cdot \vec{b}+\vec{b} \cdot \vec{a}+\vec{b} \cdot \vec{b}=|\vec{a}|^{2}+|\vec{b}|^{2} \\ & \Leftrightarrow|\vec{a}|^{2}+\vec{a} \cdot \vec{b}+\vec{a} \cdot \vec{b}+|\vec{b}|^{2}=|\vec{a}|^{2}+|\vec{b}|^{2} \\ & \Leftrightarrow 2 \vec{a} \cdot \vec{b}=0 \\ & \Leftrightarrow \vec{a} \cdot \vec{b}=0 \\ & \Leftrightarrow \vec{a} \text { अने } \vec{b} \text { परस्पर संज छे. } \end{aligned}$