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Download Worksheet1.

Using (h + a) (h + b) = h^{2} + (a + b) h + ab, find 9.8× 9.7

2.

Using (h + a) (h + b) = h^{2} + (a + b) h + ab, find 98 × 103

3.

Using (h + a) (h + b) = h^{2} + (a + b) h + ab, find 104 × 103

4.

Using (h + a) (h + b) = h^{2} + (a + b) h + ab, find 5.2 × 5.1

5.

Using a^{2} – b^{2} = (a + b) (a – b), find 153Sq – 147Sq

6.

Using a^{2} – b^{2} = (a + b) (a – b), find 12.1Sq – 7.9Sq

7.

Using a^{2} – b^{2} = (a + b) (a – b), find 51Sq – 49sq

8.

Using a^{2} – b^{2} = (a + b) (a – b), find (1.02)^{2} – (0.98)^{2}

9.

Show that: (4pq + 3q)^{2} – (4pq – 3q)^{2} = 48pq^{2}

10.

Show that: (a – b) (a + b) + (b – c) (b + c) + (c – a) (c + a) = 0

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