(m-3)*(m-2)-(m-1)*(m+2)=(m2-2m-3m+6)-(m2+2m-m-2)=(m2-5m+6)-(m2+m-2)=m2-5m+6-m2-m+2=-6m+8=-6*(1 1/4)+8=-6*(5/4)+8=-15/2+8=-15/2+16/2=1/2
(3√5-8*9√5)/3√5=(3√5-72√5)/3√5=-69√5/3√5=-23
7x - 4(x - 4) ≤ 8x + 36
7x - 4x + 16 ≤ 8x + 36
3x - 8x ≤ 36 - 16
- 5x ≤ 20
x ≥ - 4
__________[-4]______________
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Первый рисунок
8х-11=3х+14
8х-3х=14+11
5х=25
х=25:5
х=5