<span>корень под ним х2-16 равно х2-22</span>
<span>3а(а-2)-2а(а-3)=3a^2-6a-2a^2+6a=a^2
</span><span>5b(b-c)+c(2b-c)=5b^2-5bc+2bc-c^2=5b^2-3bc-c^2</span>
1)
![{3}^{ - 3} \times {3}^{5} = {3}^{ - 3 + 5} = {3}^{2} \\ {5}^{ - 2} \div {5}^{ - 3} = {5}^{ - 2 - ( - 3)} = {5}^{1} = 5 \\ 2) \frac{ {a}^{5} \times {a}^{ - 2} }{ {a}^{ - 3} } = \frac{ {a}^{3} }{ {a}^{ - 3} } = {a}^{3 - ( - 3)} = {a}^{6 } \\ ({ {x}^{ - 2} })^{ - 3} \times {x}^{4} = {x}^{6} \times {x}^{4} = {x}^{10 } \\](https://tex.z-dn.net/?f=%20%7B3%7D%5E%7B%20-%203%7D%20%5Ctimes%20%7B3%7D%5E%7B5%7D%20%3D%20%7B3%7D%5E%7B%20-%203%20%2B%205%7D%20%3D%20%7B3%7D%5E%7B2%7D%20%5C%5C%20%7B5%7D%5E%7B%20-%202%7D%20%5Cdiv%20%7B5%7D%5E%7B%20-%203%7D%20%3D%20%7B5%7D%5E%7B%20-%202%20-%20%28%20-%203%29%7D%20%3D%20%7B5%7D%5E%7B1%7D%20%3D%205%20%5C%5C%202%29%20%5Cfrac%7B%20%7Ba%7D%5E%7B5%7D%20%5Ctimes%20%7Ba%7D%5E%7B%20-%202%7D%20%7D%7B%20%7Ba%7D%5E%7B%20-%203%7D%20%7D%20%3D%20%5Cfrac%7B%20%7Ba%7D%5E%7B3%7D%20%7D%7B%20%7Ba%7D%5E%7B%20-%203%7D%20%7D%20%3D%20%7Ba%7D%5E%7B3%20-%20%28%20-%203%29%7D%20%3D%20%7Ba%7D%5E%7B6%20%7D%20%5C%5C%20%28%7B%20%7Bx%7D%5E%7B%20-%202%7D%20%7D%29%5E%7B%20-%203%7D%20%5Ctimes%20%7Bx%7D%5E%7B4%7D%20%3D%20%7Bx%7D%5E%7B6%7D%20%5Ctimes%20%7Bx%7D%5E%7B4%7D%20%3D%20%7Bx%7D%5E%7B10%20%7D%20%5C%5C%20)
3) (6^-3*2^-4):18^-2=18^2:(6^3*2^4)=324:(216*16)=36:(24*16)=6:(4*16)=3:32
1) 8-7х=0
-7х=-8
х= -8/-7
х=1.14
2) 0.2х-1=3-0.8х
х=4
3) (8х+5)-(3х+10)=25
8х+5-3х-10=25
5х=30
х=6