1.) f(-3) = x³ + x² - 7x - 3
f(-3) = (-3)³ + (-3)² - 7(-3) - 3
f(-3) = -27 + 9 + 21 - 3
f(-3) = 0
2.) f(2) = 2x³ + 3x² - 8x + 3
f(2) = 2(2)³ + 3(2)² - 8(2) + 3
f(2) = 2(8) + 3(4) - 16 + 3
f(2) = 16 + 12 - 16 + 3
f(2) = 15
3.) f(1) = 3x⁴ - 16x³ + 21x² + 4x - 12
f(1) = 3(1)⁴ - 16(1)³ + 21(1)² + 4(1) - 12
f(1) = 3 - 16 + 21 + 4 - 12
f(1) = 0
4.) f(-2) = x⁴ + x³ + - x² - x - 18
f(-2) = (-2)⁴ + (-2)³ + - (-2)² - (-2) - 18
f(-2) = 16 - 8 - 4 + 2 - 18
f(-2) = - 12
5.) f(-1) = x³ - 7x² + x + 10
f(-1) = (-1)³ - 7(-1)² + (-1) + 10
f(-1) = -1 - 7 - 1 + 10
f(-1) = 1
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Answers & Comments
Evaluate each polynomial functions, given its corresponding value of x
1.) f(-3) = x³ + x² - 7x - 3
f(-3) = (-3)³ + (-3)² - 7(-3) - 3
f(-3) = -27 + 9 + 21 - 3
f(-3) = 0
2.) f(2) = 2x³ + 3x² - 8x + 3
f(2) = 2(2)³ + 3(2)² - 8(2) + 3
f(2) = 2(8) + 3(4) - 16 + 3
f(2) = 16 + 12 - 16 + 3
f(2) = 15
3.) f(1) = 3x⁴ - 16x³ + 21x² + 4x - 12
f(1) = 3(1)⁴ - 16(1)³ + 21(1)² + 4(1) - 12
f(1) = 3 - 16 + 21 + 4 - 12
f(1) = 0
4.) f(-2) = x⁴ + x³ + - x² - x - 18
f(-2) = (-2)⁴ + (-2)³ + - (-2)² - (-2) - 18
f(-2) = 16 - 8 - 4 + 2 - 18
f(-2) = - 12
5.) f(-1) = x³ - 7x² + x + 10
f(-1) = (-1)³ - 7(-1)² + (-1) + 10
f(-1) = -1 - 7 - 1 + 10
f(-1) = 1
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