分解因式x²-3xy-4y² 2x²-20x+48
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分解因式x²-3xy-4y² 2x²-20x+48
分解因式x²-3xy-4y² 2x²-20x+48
分解因式x²-3xy-4y² 2x²-20x+48
x²-3xy-4y²
=(x-4y)(x+y)
2x²-20x+48
=2(x²-10x+24)
=2(x-4)(x-6)
x²-3xy-4y²=(x+y)(x-4y)
2x²-20x+48
=2(x²-10x+24)
=2(x-4)(x-6)
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x²-3xy-4y²
=(X-4Y)(X+Y)
2x²-20x+48
=(2X-8)(X-6)
x²-3xy-4y²
=(x-4y)(x+y)
2x²-20x+48
=2(x^2-10x+24)
=2(x-6)(x-4)