Final answer:
To simplify the expression (7x²-4)+(-2x²-1)-(5x²-5), we combine like terms. The x² terms and the constant terms cancel each other out, resulting in a simplified expression of 0.
Step-by-step explanation:
To simplify the expression (7x²-4)+(-2x²-1)-(5x²-5), we will first eliminate terms wherever possible. We do this by combining like terms, which means we add or subtract the coefficients of the same powers of x:
- Combine the x² terms: 7x² - 2x² - 5x² = 0x²
- Combine the constant terms: -4 -1 + 5 = 0
After simplifying, both the x² terms and the constant terms cancel out, leaving us with 0. You can check this answer to see if it is reasonable. There are no x terms to carry over to the final expression, thus our final simplified expression is just 0.