Answer: (c)
Step-by-step explanation:
Given
The expression is [tex]3x^2-7[/tex]
checking options, for (a)
[tex]\Rightarrow 2x^2-11-x-4\\\Rightarrow 2x^2-x-15[/tex]
option (a) is incorrect
for (b)
[tex]\Rightarrow 5x^2-6-2x^2+1\\\Rightarrow 3x^2-5[/tex]
option(b) is incorrect
for (c)
[tex]\Rightarrow 10x^2-4-7x^2-3\\\Rightarrow 3x^2-7[/tex]
option (c) is matching with the given expression.
