12Xx25%+(3200-12X)x20%=700
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12Xx25%+(3200-12X)x20%=700
12Xx25%+(3200-12X)x20%=700
12Xx25%+(3200-12X)x20%=700
12Xx25%+(3200-12X)x20%=700
12Xx5+(3200-12X)x4=700×20
60x+12800-48x=14000
12x=1200
x=100
12Xx25%+(3200-12X)x20%=700
12Xx25%+(3200-12X)x20%=700
5X+45=7X+3 12Xx25%+(3200-12X)x20%=700 (580-x)+[600-(x+272)]=444
12Xx25%+(3200-12X)x20%=700 5X+45=7X+3 (580-x)+[600-(x+272)]=444 每1步运算都要说.12Xx25%+(3200-12X)x20%=700 5X+45=7X+3 (580-x)+[600-(x+272)]=444
因式分解(x2-x)(x2-x-8)+12
x2+x-12因式分解
解一元二次方程,谢x2+12x=0,4x2-1=0,x2=7x,x2-4x-21=0,(x-1)(x+3)=12,3x2+2x-1=0
DIvide x3+x2-14x-24 by x+2Solution x2-x-12/)x-2)x3+x2-14x-24x3+2x/-2x2-14x-x2-2x/-12x-24-12x-24/0In this example we see that x+2 is a factor of x3+x2-14x-24,as the remainder is zero.Thus x3+x2-14x-24÷(x+2)=x2-x-12 with zero remainderso x3+x2-14x
解方程(x2+x+1)(x2+x+12)=42
因式分解(x2+x+1)(x2+x+2)-12=
因式分解:(x2+8x+12)(x2+8x+10)
(x2-2x)2-7(x2-2x)+12
(x2-2x)2-7(x2-2x)+12因式分解
(x2+6x+8)(x2+14x+48)+12
因式分解x2+4x-12
(x2-3)(x2-2)-2十字相乘法做 (x2+3x+2)(x2+7x+12)-24十字相乘法做
(x2+5x+2)(x2+5x+3)-12怎么因式分解 (x2)是x的平方,
解方程:1/x2+x +1/x2+3x+2 +1/x2+5x+6 +1/x2+7x+12 +1/x2+9x+20=5/x2+11x-708解方程:1/x2+x +1/x2+3x+2 +1/x2+5x+6 +1/x2+7x+12 +1/x2+9x+20=5/x2+11x-708