-49x²+14x-1+y²
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-49x²+14x-1+y²
-49x²+14x-1+y²
-49x²+14x-1+y²
原式=y²-(49x²-14x+1)
=y²-(7x-1)²
=(y+7x-1)(y-7x+1)
-49x²+14x-1+y²
=y²-(7x-1)²
=(y+7x-1)(y-7x+1)
-49x²+14x-1+y²
-49x²+14x-1+y²
-49x²+14x-1+y²
原式=y²-(49x²-14x+1)
=y²-(7x-1)²
=(y+7x-1)(y-7x+1)
-49x²+14x-1+y²
=y²-(7x-1)²
=(y+7x-1)(y-7x+1)