Q11. The diagram shows a trapezium.
x-4
Diagram NOT
accurately drawn
2x
x + 5
All the measurements are in centimetres.
The area of the trapezium is 351 cm2.
(a) Show that 2x2 + x - 351 = 0

Step-by-step explanation:

The area of a trapezium is given as;

Area = (a + b)h

where: a is the length of the upper side, b is the length of its base and h is its height.

This implies that; a = x - 4, b = x + 5, h = 2x and area = 351

Thus,

351 =  ((x - 4) + (x + 50)) 2x

      = (x - 4 + x + 5) x

531 = (2x + 1) x

      = 2 + x

So that;

2 + x - 531 = 0

This gives a quadratic equation.

a

step-by-step explanation:

answer: this is not a question

step-by-step explanation: this is a answer