(x-6)²=(x-3)² x²-12x+36=x² -6x+9 x²-x²-12x+6x=9-36 -6x=-27 x=4,5 2) (x-5 )²+(x+4)²=2x² x²-10x+25+x²+8x+16=2x²
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(x-6)²=(x-3)² x²-12x+36=x² -6x+9 x²-x²-12x+6x=9-36 -6x=-27 x=4,5 2) (x-5 )²+(x+4)²=2x² x²-10x+25+x²+8x+16=2x²