因式分解x^2+11x-80;x^2-10x=24;(a+b)^2-4(a+b-1);(x-2y)^2-(x+2y)^2+2x^2+8y^2

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因式分解x^2+11x-80;x^2-10x=24;(a+b)^2-4(a+b-1);(x-2y)^2-(x+2y)^2+2x^2+8y^2

因式分解x^2+11x-80;x^2-10x=24;(a+b)^2-4(a+b-1);(x-2y)^2-(x+2y)^2+2x^2+8y^2
因式分解x^2+11x-80;x^2-10x=24;(a+b)^2-4(a+b-1);(x-2y)^2-(x+2y)^2+2x^2+8y^2

因式分解x^2+11x-80;x^2-10x=24;(a+b)^2-4(a+b-1);(x-2y)^2-(x+2y)^2+2x^2+8y^2
x^2+11x-80;
=(x+16)(x-5)
x^2-10x+24;
=(x-4)(x-6)
(a+b)^2-4(a+b-1);
=(a+b)²-4(a+b)+4
=(a+b-2)²
(x-2y)^2-(x+2y)^2+2x^2+8y^2
=x²-4xy+4y²-x²-4xy-4y²+2x²+8y²
=2x²-8xy+8y²
=2(x²-4xy+4y²)
=2(x-2y)²