Объяснение:
[tex] {(2x + y)}^{2} = 4 {x}^{2} + 4xy + {y}^{2} [/tex]
[tex](5b - 4x)(5b + 4x) = 25 {b}^{2} - 16 {x}^{2} [/tex]
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Объяснение:
[tex] {(2x + y)}^{2} = 4 {x}^{2} + 4xy + {y}^{2} [/tex]
[tex](5b - 4x)(5b + 4x) = 25 {b}^{2} - 16 {x}^{2} [/tex]