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Ответ:

25а^2 - 1/4b^2

(6x-1.5y)(6x+1.5y)

(3a-2b^2)(3a+2b^2)

9x^2 - 12xy + 4y^2

1/16a^2 - 1.5ab + 9b^2

Ответ:

1. 5a^2-1/2b^2 = 25a^2-1/4b^2

2.(6x - 3/2 y)(6x+ 3/2 y)

3. (3a - 2116)(3a + 2116)

4.9x^2-12xy+4y^2

5.1/16a^2-3/2ab+9b^2