Observe squares: Observe that the expression inside the parentheses can be written as a difference of squares. 6+5x4 can be expressed as (6)2+(5x2)2, which is a sum of squares and not factorable over the real numbers.
Conclusion: Since the expression inside the parentheses is a sum of squares and cannot be factored further over the real numbers, we conclude that the expression is fully factored.The completely factored form of the expression is −4(6+5x4).
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