Ответ:
а) (4b – 5с)²= (4b-5c)*(4b-5c)=16b²-20bc-20bc+25c²=16b²-40bc+25c²
б) (2х – 5у)(2х + 5у)=4x²+10xy-10xy-25y²=4x²-25y²
в) 4а³ * (3а + 2b)² = 4a³ * (3a+2b)*(3a+2b) = 4a³*(9a²+6ab+6ab+4b²) =
4a³ *(9a²+12ab+4b²)=36a⁵+48a⁴b+16a³b²
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Ответ:
а) (4b – 5с)²= (4b-5c)*(4b-5c)=16b²-20bc-20bc+25c²=16b²-40bc+25c²
б) (2х – 5у)(2х + 5у)=4x²+10xy-10xy-25y²=4x²-25y²
в) 4а³ * (3а + 2b)² = 4a³ * (3a+2b)*(3a+2b) = 4a³*(9a²+6ab+6ab+4b²) =
4a³ *(9a²+12ab+4b²)=36a⁵+48a⁴b+16a³b²