3a-5b+19=0,a+8b-1=0,求(4a+3b)² -8a-6b的值?

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3a-5b+19=0,a+8b-1=0,求(4a+3b)²-8a-6b的值?3a-5b+19=0,a+8b-1=0,求(4a+3b)²-8a-6b的值?3a-5b+19=0,a+8

3a-5b+19=0,a+8b-1=0,求(4a+3b)² -8a-6b的值?
3a-5b+19=0,a+8b-1=0,求(4a+3b)² -8a-6b的值?

3a-5b+19=0,a+8b-1=0,求(4a+3b)² -8a-6b的值?
3a-5a=-19①
a+8b=1②
①+②得
4a+3b=-18
[(4a+3b)^2]-8a-6b
=18^2-2(4a+3b)
=18^2+36
=324+36
=360
你问了两遍.