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How to factorize this inequality : (23 + 2a²)² – (16a +9)² is less than equal to 0

How to factorize this inequality : 
(23 + 2a²)² – (16a +9)² is less than equal to 0 

Grade:10

1 Answers

Abhishek Singh
105 Points
9 years ago
(23 + 2a²)² – (16a +9)²
(23 + 2a²-16a -9)(23 + 2a²+16a +9)
(2a²-16a+14)(2a²+16a+32)
4(a-7)(a-1)(a+4)2
(a-7)(a+4)
a shoul belong to (-4,7)

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