Form 4: Revision

Answer all the following.

1. Round off 47745 to
(a) 3 s.f (b) 2 s.f

2. Write the following numbers in standard form.
(a) 127 (b) 0.00831

3. Factorize completely the following quadratic expressions.
(a) x^2-7x

(b) p^2-25

(c) 3t^2-12

4. Solve the following quadratic equations.

3x+5=2/x

5. Given that universal set E={x: x is an integer between 1 to 20},
A={even number}, B={odd number}, C={prime number}. Find
(a) n(A)
(b) n(C)
(c) n(B')
(d) n(C')

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Form 5 : Revision

Answer all of the following.

1. Solve the following simultaneous equations.
5p-7q=3
2p+q=5

2. Solve the following quadratic equation.
2x-5=-2/x

3. Sketch the graph of the following functions.
(a) y=3-x^2
(b) y=-2/x

4. Sketch the graphs of y=x+2,x+y=4 and x=4. On the same graph, shade the region that satisfies y4 and x<4. style="font-style: italic;">huffy64@gmail.com