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y=x3+6x2+9x y=x3-6x2+9x y=x3-6x2-9x y=x3+6x2-9x
c1e-5x+c2e6x c1e5x+c2e6x c1e2x+c2e3x c1e2x+c2x
8x2+3y2=11x2y2 4x2﹣9x2=﹣5x2 5a2b﹣5ba2=0 3m﹣(﹣2m)=5m
c1e-5x+c2e6x c1e5x+c2e6x c1e2x+c2e3x c1e2x+c2ex
)2x(3x-2)=5x2-4x ( )(2y +3x)(3x-2y)=9x2-4y2 ( )(x+2) 2=x2+2x+4 ( )(x+2)(2x-1)=2x2+5x-2
8x2+3y2=11x2y2 4x2-9x2=-5x2 5a2b-5ba2=0 3m-(-2m)=5m
3x﹣4y=16 x+2y=5 x+3y=8 2(x﹣y)=6y
x2-3y2 x2-6y2 x2-9y2 2x2-6y2
(x2-y2)+(6y-9) (x2-9)-(y2-6y) x2-(y2-6y+9) (x2+6y)-(y2+9)
x2+x2=x4 3x3y2﹣2x3y2=1 4x2y3+5x3y2=9x5y5 5x2y4﹣3x2y4=2x2y4
c1e-5x+c2e6x c1e5x+c2e6x c1e2x+c2e3x c1e2x+c2x