Пошаговое объяснение:
36 - 25x = (6 - 5x)(6 + 5x)
a +6ab+9b^2 = (a + 3b)^2
16а^2-8а+1 = (4a-1)^2
49^2x42xy+9у = (7^2 * 6xy + 3y)(7^2 * 6xy - 3y) = (294xy + 3y)(294xy - 3y) = 3(98xy + y)(98xy - y)
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Пошаговое объяснение:
36 - 25x = (6 - 5x)(6 + 5x)
a +6ab+9b^2 = (a + 3b)^2
16а^2-8а+1 = (4a-1)^2
49^2x42xy+9у = (7^2 * 6xy + 3y)(7^2 * 6xy - 3y) = (294xy + 3y)(294xy - 3y) = 3(98xy + y)(98xy - y)
2) a +6ab+9b^2 = (a+3b)^2
3) 16а^2-8а+1 = (4a-1)^2
4) 49^2x42xy+9у = (7^2*6xy + 3^2)(3y) = 1323xy^2 + 81y