Rashmi Bhartiya Solutions for Chapter: Algebraic Expression, Exercise 3: Worksheet - 68

Solve: $6x+\left(-7x-2y\right)$. 

Evaluate: $2m^2+8n$ for  $m=-2$ and $n=6$.

Write an algebraic expression for: Add twice of $x$ and $y$.

Solve: $-(-2b-\left(3b+4c\right)$.

Write algebraic expression: Subtract $4$ from thrice of $y$.

Evaluate $3m^2+2m^{2}n+n^2$ for $m=-1$ and $n=1$.

Solve: $-\left(49-a^2\right)-5a^2$.