The net of a box is made by cutting four squares
from a piece of cardboard.
The cardboard is a rectangle with width x cm
and length (x + 10) cm
Each square has side length 5 cm
The area of the net is 1475 cm²
The equation x² + ax + b = 0 can be formed.
Work out the value of a and the value of b.
a =
b=
PO
4
(2)
(2)
C
5 cm
x cm
(x + 10) cm
Total marks: 4