Ответ:
Объяснение:
[tex](5-b)(5+b)-2b(b-3) = 25-b^{2}-2b^{2}+6b = -3b^{2}+6b+25[/tex]
[tex]-5y(y+3)+(y-4)^{2} = -5y^{2} +15y+y^{2} -8y+16=-4y^{2} +7y+16[/tex]
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Ответ:
Объяснение:
[tex](5-b)(5+b)-2b(b-3) = 25-b^{2}-2b^{2}+6b = -3b^{2}+6b+25[/tex]
[tex]-5y(y+3)+(y-4)^{2} = -5y^{2} +15y+y^{2} -8y+16=-4y^{2} +7y+16[/tex]