These are "composite" functions.
g(x+a) means insert (x+a) into g(x) to replace every x:
g(x+a) - g(x) = -5(x+a)^2 +4(x+a) +5x^2 - 4x
= -5(x^2 + 2ax + a^2) +4x +4a + 5x^2 - 4x
Now just Multiply and sum up the answer.
Answer:
Simply count 4 × 6 =28
Step-by-step explanation:
378 x 6<span> as (300 x 6) + (70 x 6) + (8 x 6) = 1800 + 420 + 48 = 2268</span>
