Solve by $taclo\pi mg$ $2sx^{2}+5x-12-0$ Please enter any square root values using "sqrt" or the decimal answer rounded to the nearest hundredth $\left(1.c.\sqrt{2} =$ $sa\pi \left(2$ $1\left(2\right)0t$ $1.41\right)$

$∠$ $F$ From the sum $ot$ $x^{A}\left(2\right)-8$ with $3x-12$ subtract the sum $ofx-9$ with $3x-x^{A}\left(2\right)$ Multinlication takes place $\left(2\times A$ $\left(2\right)+5x+21\right)\left(x-$ $5\right)=$ #Please provide solution by using math formula.

The rationalizing factor of \sqrt{23} is $°$ $Options^{°}$ $0$ A 24 23 C \sqrt{23} D None of these