[tex]{(2b - 5)}^{2} - 36 = [/tex]
Раскрываем скобки по формуле (а - б)² = а² - 2аб + б² ↓
[tex] = {4b}^{2} - 20b + 25 - 36 = {4b}^{2} - 20b - 11[/tex]
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[tex]{(2b - 5)}^{2} - 36 = [/tex]
Раскрываем скобки по формуле (а - б)² = а² - 2аб + б² ↓
[tex] = {4b}^{2} - 20b + 25 - 36 = {4b}^{2} - 20b - 11[/tex]