Symbol
Problem
$Direction$ Find the solution set of the followi $1$ $x\left(x+3\right)=28$ $2.$ $x\left(x+6\right)$ $=8\left(x+3\right)$ $3$ $\left(t+1\right)^{2}+\left(t-8\right)^{2}=45$ $4$ $\left(3r+1\right)^{2}+\left(r+2\right)^{2}=65$ $5$ $\dfrac {1} {x-1}+\dfrac {1} {2}=\dfrac {2} {x^{2}-1}$