A) \[\left( x-9 \right)\left( x-6 \right)\]
B) \[\left( x-9 \right)\left( x+6 \right)\]
C) \[\left( x+9 \right)\left( x+6 \right)\]
D) \[\left( x-4 \right)\left( x+3 \right)\]
Correct Answer: B
Solution :
(b): \[{{x}^{2}}-3x-54\] Roots = \[\frac{3\pm \sqrt{9-4\times -54}}{2}\] \[=\frac{3\pm \sqrt{225}}{2}\] \[=\frac{3\pm 15}{2}=9\,or\,-6\]
You need to login to perform this action.
You will be redirected in
3 sec
