19.The product of (3x-4y) and (3x+4y) is
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Answer:
9x²-16y²
Step-by-step explanation:
(3x+4y)(3x-4y)
Using the algebraic identity:
(a+b)(a-b) = a²-b²
(3x+4y)(3x-4y)
= (3x)²-(4y)²
= 9x²-16y²
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