Matematika

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(x-2)² = (x-3)² -7 adalah...

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  • (x-2)² = (x-3)² -7
    (x-2)(x-2) = (x-3)(x-3)-7
    x²-2x-2x+4 = x²-3x-3x+9 -7
    x²-4x+4 = x²-6x+9-7
    x²-x²-4x+6x = 9-7-4
    2x = -2
    x= -1

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