plz solve in nb and send pic
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the answer should be this if I am not wrong
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valda:
happy to help
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9x² - (x² - 4)²
(3x)² - (x² - 4)²
using identify (a² - b²) = (a - b)(a + b)
(3x - x² + 4)(3x + x² - 4)
(-x² + 3x + 4)(x² + 3x - 4)
(-x² + 4x - x + 4)(x² + 4x - x - 4)
[-x(x - 4) - 1(x - 4)][x(x + 4) - 1(x + 4)]
[-(x + 1)(x - 4)][(x - 1)(x + 4)]
(x² - 16)[-(x² - 1)]
(x² - 16)(-x² + 1)
(3x)² - (x² - 4)²
using identify (a² - b²) = (a - b)(a + b)
(3x - x² + 4)(3x + x² - 4)
(-x² + 3x + 4)(x² + 3x - 4)
(-x² + 4x - x + 4)(x² + 4x - x - 4)
[-x(x - 4) - 1(x - 4)][x(x + 4) - 1(x + 4)]
[-(x + 1)(x - 4)][(x - 1)(x + 4)]
(x² - 16)[-(x² - 1)]
(x² - 16)(-x² + 1)
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