4.7 - х - 2.8 = 0.1
4.7 - 2.8 = 0.1
1.9 - х = 0.1
-х = 0.1 - 0.9
-х = -1.8
х = 1.8
<span> НОД (2*3*5;48)=НОД (30;48)=6</span>
<span> НОД (35; 5*3*11)=НОД (35; 165)=5</span>
<span>6-5=1</span>
1. 5(х^2-9)=5(х-3)(х+3)
2. а(х^2-4)=а(х-2)(х+2)
3. 3(х^2-25а^2)=3(х-5а)(х+5а)
4. 2a(-y^2+a^2)=2a(a-y)(a+y)
5. 10ab+(5a^2-5b^2)=10ab+5(a-b)(a+b)
6. a(x^2-2xy+y^2)=a(x-y)^2
7. 12ab+(-6a^2-6b^2)=12ab-6(a^2-b^2)=12ab-6(a+b)(a-b)