Sagot :
Answer:
f(x + 1) = 3x² + 5x + 7 (Letter B)
Step-by-step explanation:
f(x) = 3x²-x + 5
f(x + 1) = 3(x + 1)² - (x + 1) + 5
= 3(x² + x + x + 1) - x - 1 + 5
= 3(x² + 2x + 1) - x - 1+5
= 3x² + 6x + 3-x-1+5
f(x + 1) = 3x² + 5x+7
Answer:
f(x + 1) = 3x² + 5x + 7 (Letter B)
Step-by-step explanation:
f(x) = 3x²-x + 5
f(x + 1) = 3(x + 1)² - (x + 1) + 5
= 3(x² + x + x + 1) - x - 1 + 5
= 3(x² + 2x + 1) - x - 1+5
= 3x² + 6x + 3-x-1+5
f(x + 1) = 3x² + 5x+7