(4-x)²-x·(x-3)=12
16-8x+x²-x²+3x=12
-8x+3x=12-16
-5x=-4 /:(-5)
x=0,8
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(4-x)²-x·(x-3)=12
16-8x+x²-x²+3x=12
-8x+3x=12-16
-5x=-4 /:(-5)
x=0,8