作业帮(1)6x²-(x-1)(x-2)-2(x-1)(x+3)(2)(a+2b)²(a-2b)²(3)(a-b)∧2n*(b-a)*(a-b)∧m-1
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(1)6x²-(x-1)(x-2)-2(x-1)(x+3)(2)(a+2b)²(a-2b)²(3)(a-b)∧2n*(b-a)*(a-b)∧m-1
(1)6x²-(x-1)(x-2)-2(x-1)(x+3)
(2)(a+2b)²(a-2b)²
(3)(a-b)∧2n*(b-a)*(a-b)∧m-1
(1)6x²-(x-1)(x-2)-2(x-1)(x+3)(2)(a+2b)²(a-2b)²(3)(a-b)∧2n*(b-a)*(a-b)∧m-1
(1)6x²-(x-1)(x-2)-2(x-1)(x+3)
=6x²-(x²-3x+2)-2(x²+2x-3)
=6x²-x²+3x-2-2x²-4x+6
=(6x²-x²-2x²)+(3x-4x)-2+6
=3x²-x+4
(2)(a+2b)²(a-2b)²
=[(a+2b)(a-2b)]²
=(a²-4b²]²
=a^4-8a²b²+16b^4
(3)(a-b)∧2n*(b-a)*(a-b)∧m-1
=-(a-b)^2n*(a-b)*(a-b)∧m-1
=-(a-b)^(2n+1+m-1)
=-(a-b)^(m+2n)