The diagram shows two right-angled triangles ABE and BCD. AE = 9.5 cm, BE = 5.7 cm and CD = 2.8 cm.
ABC = 90°.
9.5 cm
a) Calculate the size of angle x.
[3]
+
B
5.7 cm x
D!
2.8 cm
b) Calculate the length of BC.
[4]
+
Diagram not drawn to scale

Dividing the first term with the denominator (x^2+4), you get: 2/3 (x^2+4)^(-(1)/2) (x^2-9)^((-2)/3)
Dividing the first term with the denominator (x^2+4), you get: 2/3 (x^2+4)^(-(1)/2) (x^2-9)^((-2)/3) Dividing the first term with the denominator (x^2+4), you get: 2/3 (x^2+4)^(-(1)/2) (x^2-9)^((-2)/3)

The answer that i got was 8/3