Answer:
(f + g)(x) = – 3x^2 + 5x - 8
Step-by-step explanation:
(f + g)(x) = f(x) + g(x)
= 5x^2 + 9x – 4 + (– 8x^2 – 3x – 4)
= 5x^2 + 9x – 4 – 8x^2 – 3x – 4
Combine
= – 3x^2 + 5x - 8
Answer:
Step-by-step explanation:
2x+2≤x+4≤3x+4
means : 2x+2≤x+4 ...(1) and x+4≤3x+4
(1) : 2x-x≤4-2 so : x≤2....(*)
(2) :3x+4 ≥x+4 .... 3x-x ≥ 0 so: x≥0 ....(**)
by (*) and (**) : 0≤x≤2 so : A=0 and B = 2
