Question

Factorisation
9x4 - x2 - 12x - 36

plss give the right answer with explanation I will mark u brainliest​

Answer 1

Answer:

$9x {}^{4} - x {}^{2} - 12x - 36$

Above terms can be written as,

$9x {}^{4} - (x {}^{2} + 12x + 36)$

We know that,

$(3x {}^{2}) {}^{2} - (x {}^{2} + 2 \times 6 \times x) + 6 {}^{2})$

So,

$(3x {}^{2}) {}^{2} - (x + 6) {}^{2}$

$we \: know \: that \: \\ = > a {}^{2} - b {}^{2} = (a + b)(a - b)$

Answer :-

$(3x {}^{2} + x + 6)(3x {}^{2} - x - 6)$

Step-by-step explanation:

@Genius

Answer 2

Answer:

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9x⁴ - x² - 12x - 36

USING FORMULA

a² - b² = ( a + b ) ( a - b )

now

= 9⁴ - [ x² + 12x + 36 ]

= ( 3x² )² - ( x + 6 )²

= ( 3x² + x + 6 ) ( 3x² - ( x + 6 )

= ( 3x² + x + 6 ) ( 3x² - x - 6 )

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