Rut gon: A=(x^2 - 2x + 2)(x^2 - 2)(x^2 + 2x + 2)(x^2 + 2)
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rut gon bieu thuc.
A)(X^2-1).(X+2)-(X-2).(X^2+2X+4)
B)(2X+3)^2+(2X+5)^2-2.(2X+5).(2X+3)
Rut gon a biet a=(x^2-2x/2^2+8+2x^2/8-4x+2x^2-x^3)x(1-1/-2/^2)
Ai giup minh minh tick nha ::)))
rut gon (x^2+2x+1)\(x-1)^2:(2x^2+4x+2)\(4x^2-8x+4)
\(=\frac{\left(x+1\right)^2}{\left(x-1\right)^2}:\frac{2\left(x+1\right)^2}{4\left(x-1\right)^2}=\frac{\left(x+1\right)^2}{\left(x-1\right)^2}.\frac{4\left(x-1\right)^2}{2\left(x+1\right)^2}=2\)
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rut gon bieu thuc a,(3x+2)^2+4x-3^2+2(5x-2)(5x+2)-75x^2
b,(x-2)^3+(2x+1)^3++2(x+2)(1-x)-9x^3+2x
a: \(\left(3x+2\right)^2+4x-3x^2+2\left(5x-2\right)\left(5x+2\right)-75x^2\)
\(=9x^2+12x+4+4x-3x^2+50x^2-8-75x^2\)
\(=-19x^2+16x-4\)
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cho A= (2x-1)^2 -5x.(x-1)+2.(x+1).(x-2) rut gon bieu thuc A
\(A=\left(2x-1\right)^2-5x\left(x-1\right)+2\left(x+1\right)\left(x-2\right)\)
\(=4x^2-4x+1-5x^2+5x+2\left(x^2-x-2\right)\)
\(=x^2-x-3\)
rut gon bieu thuc: 2x2(x-2) - 2x(x-1)(x+1)
\(2x^2\left(x-2\right)-2x\left(x-1\right)\left(x+1\right)=2x^3-4x^2-2x^3+2x=-4x^2+2x=-2x\left(2x-1\right)\)
\(2x^2\left(x-2\right)-2x\left(x-1\right)\left(x+1\right)\)
\(=2x^3-4x^2-2x\left(x^2-1\right)\)
\(=2x^3-4x^2-2x^3+2x=-4x^2+2x\)
rut gon A=(2x-2)^2-4x(x-2)+46
\(A=\left(2x-2\right)^2-4x\left(x-2\right)+46\)
\(\Leftrightarrow A=4x^2-8x+4-4x^2+8x+46\)
\(\Leftrightarrow A=50\)
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\(A=\left(2x-2\right)^2-4x\left(x-2\right)+46\)
\(A=4x^2-8x+4-4x^2+8x+46\)
\(A=50\)
Chúc bạn học tốt!!!
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A = (2x - 2)2 - 4x(x - 2) + 46
=> A = 4x2 - 8x + 4 - 4x2 + 8x + 46
=> A = (4x2 - 4x2) + (-8x + 8x) + 4 + 46
=> A = 50
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rut gon bieu thuc 2ax^2-a(1+2x^2)-[a-x(x+a)]
2ax^2-a(1+2x^2)-[a-x(x+a)]
=2ax2-2ax2+a+x2-ax+a
=(2ax2-2ax2)-(a+a)+ax+x2
=0-2a+ax+x2
=x2+ax-2a
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rut gon bieu thuc A
A=(x/2x-4+2/2-x+1/x+2):(x-2+10-x2/x+2)