For this case we evaluate the following inequality in the given point and verify if it is met:


Substituting:


It is not fulfilled!
The point does not satisfy the inequality
ANswer:
False
4x(-2) + 4 x 7 4x5 + 2x(-1) =[-8 20]
[28 -2 ]
The HCF is the Highest Common Factor of a number in this case 54. This is the highest number times another number which = 54. The HCF for 54 is 18.
Answer:
I have made it in picture hope it helps