(9x^2 - 1) - (1+3x)^2
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So Your question --> ( 9x² - 1) - ( 1 + 3x )²
= 9x² - 1 - ( 1 + 9x² + 6x)
= 9x² - 1 - 1 - 9x² + 6x
so 9x² will be subtracted and will get 0
= - 1 -1 + 6x
= - 2 + 6x
= 6x - 2
Answer bro
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