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If |3a+b+5||2a-2b-2|=0, the value of the square-3ab of 2a is ___
|3A+b+5||2a-2b-2|=0
3A+b+5=0
2A-2b-2=0
A=-1
B=-2
Square-3ab of 2a
=2*(-1)^2-3*(-1)*(-2)
=2-6
=-4
A new operation is given: a*b=a+b, a@b=a-b, where a and b are rational numbers, simplify a^2b*3ab+5a^2b@4ab, and find out that when a=5, b=3, the value is more Less Specify a new operation: a*b=a+b, a@b=a-b, where a and b are rational numbers, simplify a^2b*3ab+5a^2b@4ab, and find out that when a=5, b=3, the value is more Less
A^2b*3ab+5a^2b@4ab
=A^2b+3ab+5a^2b-4ab,
=6A^2b-ab
=Ab (6a-1)
=5*3*(6*5-1)
=435
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