Answer
0
Work Step by Step
We are given the expression $(7x^{2}-5)+(-3x^{2}-2)-(4x^{2}-7)$. To subtract the third term from the first two, we can add the opposite of the third term.
$(7x^{2}-5)+(-3x^{2}-2)+(-4x^{2}+7)$
Next, we can combine like terms.
$(7x^{2}-3x^{2}-4x^{2})+(-5-2+7)=0$
