| If \[5x+8={{x}^{2}}+P=4x+9.\]What is the value of P? |
A) 18
B) 19
C) 12
D) 15
Correct Answer: C
Solution :
| \[5x+8=4x+9\] |
| \[\Rightarrow \] \[x=1\] |
| \[\Rightarrow \] \[5x+8={{x}^{2}}+p\] |
| \[\Rightarrow \] \[5+8={{1}^{2}}+p\] [putting \[x=1\]] |
| \[\Rightarrow \] \[p=12\] |
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