Question

a=x,
h=(x - 4)
b=(2x + 1)

.area of trapezium is 33 m^2

Answer 1

Area=1/2(a+b)h

33 =1/2*3x+1*x-4

66=3x²-12x+x-4

70=3x²-11x

3x²-11x-70=0

3x²-21x+10x-70=0

3x(x-7)+10(x-7)=0

3x+10=0 or x-7=0

x=-10/3 or x=7