a²+3b²-3a-3b=-3,则a=,b=
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a²+3b²-3a-3b=-3,则a=,b=
![a²+3b²-3a-3b=-3,则a=,b=](/uploads/image/z/344579-59-9.jpg?t=a%26%23178%3B%2B3b%26%23178%3B-3a-3b%3D-3%2C%E5%88%99a%3D%2Cb%3D)
a²+3b²-3a-3b=-3
a²-3a+3b²-3b+3=0
a²-3a+(3/2)²-(3/2)²+3(b²-b)+3=0
a²-3a+(3/2)²-(3/2)²+3(b²-b+(1/2)²-(1/2)²)+3=0
(a-3/2)² -9/4+3(b-1/2)²-3/4+3=0
(a-3/2)² +3(b-1/2)²=0
(a-3/2)=0 (b-1/2)=0
则有a=3/2 b=1/2
a²-3a+3b²-3b+3=0
a²-3a+(3/2)²-(3/2)²+3(b²-b)+3=0
a²-3a+(3/2)²-(3/2)²+3(b²-b+(1/2)²-(1/2)²)+3=0
(a-3/2)² -9/4+3(b-1/2)²-3/4+3=0
(a-3/2)² +3(b-1/2)²=0
(a-3/2)=0 (b-1/2)=0
则有a=3/2 b=1/2
计算代数式a-b+(a-2b)(a-b)+(a-2b)(a-b)²+(a-2b)(a-b)^3 当a=-3
2b²+(a+b)(a-b)-(a-b)²,其中a=-3
若a,b满足|a+5b-2|+(a+b-6)²=0,求代数式(a-3b)(a+2b)-(a+5b)(a+3b)
规定两种新运算:a*b=a+b,a#b=a-b,其中a、b为有理数.化简a²b*3ab+5a²bb#
A=B+B+B+B+B+B+B+B+B+B+B+B+B+B+B A-B×3=C C+2×7+2=1
化简-3a-a+b+2b²+a+b-2b²=?
定义新运算a&b=a+b*b,则(3a*a&2b)-(a*a+b)=( )
a²+b²=0 求(a+b)(3a+2b)-b(5a-b)
a²+3b²-3a-3b=-3,则a=,b=
a-b\a+b=1\2时,求代数式a+b\3(a-b) - a-b\2(a+b)
a-b\a+b=1\2时,求代数式a+b\3(a-b) - a-b\2(a+b)=?,则a=?b=?
先化简,再求值,-3(a+b)(a-b)+(2a-b)² ,其中a=2,