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Example 4 Find the values of the following expressions for x = 2. (i) x + 4 x + 4 Putting x = 2 = 2 + 4 = 6 Example 4 Find the values of the following expressions for x = 2. (ii) 4x – 3 4x − 3 Putting x = 2, = 4 (2) − 3 = 8 − 3 = 5 Example 4 Find the values of the following expressions for x = 2. (iii) 19 – 5x219 − 5x2 Putting x = 2 = 19 − 5(2)2 = 19 − 5 (4) = 19 − 20 = −1 Example 4 Find the values of the following expressions for x = 2. (iv) 100 – 10x3 100 − 10x3 Putting x = 2 = 100 − 10(2)3 = 100 − 10(8) = 100 − 80 = 20

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.