Find f(-2) for the function f(x) = -3x³ - x² + 2x - 8
f(x) = -3x³ - x² + 2x - 8
f(-2) = -3(-2)³ - (-2)² + 2(-2) - 8 {substituted -2 for x}
= -3(-8) - 4 - 4 - 8 {evaluated exponents and multiplied}
= 24 - 4 - 4 - 8 {multiplied -3 by 4}
= 8 {subtracted}
- Algebra House
f(-2) = -3(-2)³ - (-2)² + 2(-2) - 8 {substituted -2 for x}
= -3(-8) - 4 - 4 - 8 {evaluated exponents and multiplied}
= 24 - 4 - 4 - 8 {multiplied -3 by 4}
= 8 {subtracted}
- Algebra House
