计算(2x-3y+1)(2y+3x-1)的结果是A.4x∧2-12xy+9y∧2-1 B.4x∧2计算(2x-3y+1)(2y+3x-1)的结果是A.4x∧2-12xy+9y∧2-1B.4x∧2-9y∧2-6y-1C.4x∧2+9y∧2-1D.4x∧2-9y∧2+6y-1
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计算(2x-3y+1)(2y+3x-1)的结果是A.4x∧2-12xy+9y∧2-1 B.4x∧2计算(2x-3y+1)(2y+3x-1)的结果是A.4x∧2-12xy+9y∧2-1B.4x∧2-9y∧2-6y-1C.4x∧2+9y∧2-1D.4x∧2-9y∧2+6y-1
计算(2x-3y+1)(2y+3x-1)的结果是A.4x∧2-12xy+9y∧2-1 B.4x∧2
计算(2x-3y+1)(2y+3x-1)的结果是A.4x∧2-12xy+9y∧2-1
B.4x∧2-9y∧2-6y-1
C.4x∧2+9y∧2-1
D.4x∧2-9y∧2+6y-1
计算(2x-3y+1)(2y+3x-1)的结果是A.4x∧2-12xy+9y∧2-1 B.4x∧2计算(2x-3y+1)(2y+3x-1)的结果是A.4x∧2-12xy+9y∧2-1B.4x∧2-9y∧2-6y-1C.4x∧2+9y∧2-1D.4x∧2-9y∧2+6y-1
解由直线2x-3y+4=0的斜率k=2/3
则所求直线的斜率k=-3/2
又由所求直线过点(-1,2)
故所求直线方程为
y-2=-3/2(x+1)
即为2y+3x-1=
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