Mathematics
Grade10
Easy
Question
Find the product. (0.4x + 1.2)2
- 0.16x2 + 1.44
- 0.16x2 + 0.96x + 1.44
- 0.16x2 – 0.96x + 1.44
- 0.16x2 – 0.96
The correct answer is: 0.16x2 + 0.96x + 1.44
Using the pattern (a + b)2 = a2 + 2ab + b2,
(0.4x + 1.2)2 = 0.16x2 + 20.4x1.2 + 1.44 = 0.16x2 + 0.96x + 1.44
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