Question

(3x2– 4xy)(3x2 + 3xy)Find the following by using suitable identity :​

Answer 1

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Answer 2

Answer:

= 3x2 (3x2 – 3xy) – 4xy (3x2 – 3xy) = 9x4 – 9x3y – 12x3y + 12x2y2 = 9x4 – 21x3y + 12x2y2

Step-by-step explanation:

= 3x2 (3x2 – 3xy) – 4xy (3x2 – 3xy) = 9x4 – 9x3y – 12x3y + 12x2y2 = 9x4 – 21x3y + 12x2y2