Follow-up question Factorize x2 + 2x – 15. Solution

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Presentation transcript:

Follow-up question Factorize x2 + 2x – 15. Solution List all the possible pairs of factors of –15. Check each pair of factors by the cross-method as follows:

We have learnt the following laws of indices before: If both m and n are positive integers, then …… Law (1) …… Law (2) …… Law (4) …… Law (5)

Follow-up question 7.7  105 54 000 1.8  10-5 0.002 005 -1.4  104 Complete the following table. 7.7  105 54 000 1.8  10-5 0.002 005 -1.4  104

Follow-up question 1. Convert 11110(2) into a denary number. 2. Convert 10(10) into a binary number.

(10) 691 (16) 2B3 = 2 B 3 Write the digits from the bottom to the top.