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\(\left(4x^2-7x-50\right)^2-16x^4-56x^3-49x^2\)
\(=\left(4x^2-7x-50\right)^2-\left(4x^2\right)^2-2.4x^2.7x-\left(7x\right)^2\)
\(=\left(4x^2-7x-50\right)^2-\left(4x^2-7x\right)^2\)
\(=\left(4x^2-7x-50-4x^2+7x\right)\left(4x^2-7x-50+4x^2-7x\right)\)
\(=-50\left(8x^2-14x-50\right)\)
d) \(ax^2-5x^2-ax+5x+a-5=\left(ax^2-ax+a\right)+\left(-5x^2+5x-5\right)\)
\(=a\left(x^2-x+1\right)-5\left(x^2-x+1\right)=\left(a-5\right)\left(x^2-x+1\right)\)
e) \(ax-bx-2cx-2a+2b+4c=x\left(a-b-2c\right)-2\left(a-b-2c\right)\)
\(=\left(x-2\right)\left(a-b-2c\right)\)
a: \(=3x^2-3y^2=3\left(x-y\right)\left(x+y\right)\)
b: \(=\left(4x^2-7x-50\right)^2-\left(16x^4+56x^3+49x^2\right)\)
\(=\left(4x^2-7x-50\right)^2-\left(4x^2+7x\right)^2\)
\(=\left(4x^2-7x-50-4x^2-7x\right)\left(4x^2-7x-50+4x^2+7x\right)\)
\(=\left(-14x-50\right)\left(8x^2-50\right)\)
\(=-4\left(7x+25\right)\left(2x-5\right)\left(2x+5\right)\)
d: \(=\left(x^2+y^2\right)^3-8x^3y^3\)
\(=\left(x^2+y^2-2xy\right)\left[x^4+2x^2y^2+y^4+2x^3y^2+2x^2y^3+4x^2y^2\right]\)
\(=\left(x-y\right)^2\cdot\left[x^4+y^4+6x^2y^2+2x^3y^2+2x^2y^3\right]\)
a: \(=3x^2-3y^2=3\left(x-y\right)\left(x+y\right)\)
c: \(=\left(x^2-y^2\right)^2-10\left(x^2-y^2\right)+25-4\left(x^2y^2+4xy+4\right)\)
\(=\left(x^2-y^2-5\right)^2-4\left(xy+2\right)^2\)
\(=\left(x^2-y^2-5-2xy-4\right)\left(x^2-y^2-5+2xy+4\right)\)
\(=\left(x^2-y^2-2xy-9\right)\left(x^2+2xy-y^2-1\right)\)
\(=\left(4x^2-7x-50\right)^2-x^2\left(16x^2+56x+49\right)\)
\(=\left(4x^2-7x-50\right)^2-x^2\left(4x+7\right)^2\)
\(=\left(4x^2-7x-50-4x^2-7x\right)\left(4x^2-7x-50+4x^2+7x\right)\)
\(=\left(-14x-50\right)\left(8x^2-50\right)\)
\(=-4\left(7x+25\right)\left(2x-5\right)\left(2x+5\right)\)