Q: 1 Shown below are the parts of graphs of two polynomials, g (x) and h ( x ). When h ( x ) is divided by (x-3), the remainder is k. g(x) h(x) Which of these is true for the remainder when g(x) is divided by (x - 3)? 1 It is less than k. 2 It is equal to k. 3 It is more than k. 4 (cannot conclude without knowing the polynomials)
Answers & Comments
Answer:
In the picture attached, we have two questions.
⇒ Q1)
Now, the graph shows both the polynomials.
→ When h(x) is divided by (x - 3), the remainder is k.
→ When g(x) is divided by (x - 3), let the remainder be m
We know the remainder theorem: when a polynomial p(x) is divided by a linear polynomial (x - a), then the remainder is equal to p(a).
Since h(x) is divided by (x-3), the remainder is h(3) = k.
Since g(x) is divided by (x-3) remainder is g(x) = m
Looking at the graph, at x = 3, we can conclude:
⇒ h(3) > g(3)
⇒ k > m.
So, the remainder of g(x) when divided by (x-3) is less than k.
Option 1 is correct.
⇒ Q2)
Again, the remainder theorem can be used.
Since the desired remainder is 0, h(x) = 0,
Referring to the graph, h(x) is 0 only when x = -2.
Therefore (x+2) is a factor of the polynomial because (x+2=0), x= -2.
Therefore, Option ii is correct.