Mathematics
Senior High
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式変形の仕方を教えてください🙇♀️
(2) x2+2y2+3xy+x+5y-12
= x²+(3y+1)x+2y²+5y-12
x²+(3y+1)x+(y+4) (2y-3)
G (x+y+4)(x+2y-3)
(3)x2 = X とおくと
x4-7x2-18=X2-7X-18
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