Expand the following. (3x -2y)(3x+ 2y)(9x^2 +4y^2)
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Answered by
26
= (3x -2y)(3x+ 2y)(9x² + 4y²)
= [(3x)² - (2y)²] [9x² + 4y²]
= [9x² - 4y²] [9x² + 4y²]
= [(9x²)² - (4y²)²]
= 81x^4 - 16y^4
= [(3x)² - (2y)²] [9x² + 4y²]
= [9x² - 4y²] [9x² + 4y²]
= [(9x²)² - (4y²)²]
= 81x^4 - 16y^4
Answered by
4
Answer:
81x^4 -16y^4
Step-by-step explanation:
Apply the formula:-(a+b)(a-b)=a^2-b^2
{(3x+2y)(3x-2y)(9x^2+4y^2)}
= (9x^2-4y^2)(9x^2+4y^2)
(Again apply the formula above)
=81x^4-16y^4
This will be the answer.
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