3. Which of the following are the factors of 49x2 - 81? A. (7x-9)(7x -9) C. (7x - 9)(7x + 9) B.(7x + 9) (7x +9) D. (x + 9) (7x-9) 4. Which of the following are the factors of 64x2 – 100y?? A. (8x - 10y)(8x + 10y) C. (8x + 10y)(8x + 10y) B.(8x - 10y)(8x - 10y) D. (8x2 - 10y2)(8x2 + 10y2) - - - 5. Which of the following are the factors of 121x4 -- 4y?? A. (11x2 + 4y)(11x2 + 4y) C. (11x2 - 4y)(11x2 – 4y) B.(11x2 - 4y)(11x2 + 4y) D. (11x - 4y)(11x + 4y)
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Answer:
3. C. (7x - 9)(7x + 9)
4. A. (8x - 10y)(8x + 10y)
5. D. (11x - 4y)(11x + 4y)
Step-by-step explanation: