X⁴ + x³ - 2x² + x + (2x⁴ - 2x²<span> - 3) =
</span>x⁴ + x³ - 2x² + x + 2x⁴ - 2x² - 3 =
3x⁴ + x³ - 4x² + x - 3 ← <span>the missing polynomial</span>
Answer:
B. 15 
Step-by-step explanation:

just a plain vanilla substitution

m is the slope
b is the y-intercept
so that means that the y-intercept of

is
