а) а^3-4a=a(a^2-4)=a(a-2)(a+2)
б) ax^2-ay^2=a(x^2-y^2)=a(x-y)(x+y)
в) 3a^2-6ab+3b^2=3(a^2-2ab+b^2)=3(a-b)^2
г) ax^2+2ax+a=a(x^2+2x+1)=a(x+1)^2
а) а^3-4a=<span>(a-2)*a*(a+2)</span>
б) <span>ax^2-ay^2=-a*(y-x)*(y+x)</span>
в) <span>3a^2-6ab+3b^2=3*(b-a)^2</span>
г) <span>ax^2+2ax+a=a*(x+1)^2</span>
arcsin (-√2/2)=-arcsin (√2/2)=-pi/4
Решение:
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Х=-4; у=-14
Х=-3; у=-7
Х=-2; у=-2
Х=-1; у=1
Х=0; у=2
Х=2; у=-2
Х=6; у=-34
Х=10; у=-98
Х=30; у=-898