Ответ:
1)18
2)80.87
3)-2
4)31
Объяснение:
1)[tex](-2,5-2*1,5)^{2} -(2*2,5-1,5)^{2}[/tex]
[tex](-2,3-3)^{2} -(5-1.5)^{2}[/tex]
[tex](-5.5)^{2} -3.5^{2}[/tex]
[tex](\frac{-11}{2} )^{2} -(\frac{7}{2} )^{2}[/tex]
[tex]\frac{121}{4} -\frac{49}{4}[/tex]=18
2)[tex](0.125^{2} -2)^{2} -(0.125-1)(0.125+2)+5(0.125-4)^{2}[/tex]
[tex](\frac{1}{64} -2)^{2} +0.875*2.125+5*3.875^{2}[/tex]
[tex](\frac{-127}{64} )^{2} +1.859375+5*(\frac{31}{8} )^{2}[/tex]
[tex]\frac{16129}{4096} +\frac{119}{64}+ \frac{4805}{64} =\frac{331265}{4096}=[/tex][tex]80\frac{3585}{4096} =80.87[/tex]
3)[tex](2.5-3)^{2} -(2.5-2)(2.5+2)[/tex]
[tex](0.5)^{2} -0.5*4.5[/tex]
[tex](\frac{-1}{2} )^{2} -2.25[/tex]
[tex]\frac{1}{4} -\frac{9}{4} =-2[/tex]
4)[tex](-3^{2} -1)(-3^{2}+1)-(-3^{2} +2)^{2}[/tex]
[tex](-9-1)(-9+1)-(-9+2)^{2}[/tex]
80-49=31