Mathematics
Senior High
なぜ6yー7y-3
が(2yー3)(3y+1)
になるのですか?
E+ (xS+ ³x)A-f(xS+ ³x
(2) 与式=x2+(5y-2)x+(6y2-7y-3)
=x²+(5y-2)x+(2y-3)(3y+1
= {x+(2y-3)}{x+(3y+1)}
13
= (x+2y-3)(x+3y+1)
2y-3
it
[+XXI
3y+1
1 (2y-3)(3y+1) -
1-6
2y-3
3y+1
5y-2
5y-2 d
D([-
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