Answer:
The answer is "[tex]\bold{-3(12r^2-369r+22)}\\[/tex]"
Explanation:
In the given question, there is mistype error in the equation so, the correct equation can be defined as follows:
[tex]\Rightarrow15r-3r+615r-3r12r+612r-66\left(2r+1\right) \\\\[/tex]
Solve the above equation:
[tex]\Rightarrow 15r-3r+615r-36r^2+612r- 132r-66 \\\\\Rightarrow 1242r-36r^2- 135r-66 \\\\\Rightarrow 1242r- 135r-36r^2-66 \\\\\Rightarrow 1107r-36r^2-66 \\\\\Rightarrow -36r^2+1107r-66 \\\\\Rightarrow -3(12r^2-369r+22) \\\\[/tex]
