exam Maths Puzzle Numerical Ability

Q. Show that 2 - i is a root of z^4 - 8z^3 + 28z^2 - 48z + 35. Hence fond all the roots

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exam Other Question

The length of a rectangle is 5 meters more than twice it's width. If the perimeter of the rectangle is 46m, find the dimensions of the rectangle Could someone help me graph the follwing and show me what the graph looks like?

y = x + 2

Thank you,
Lyn