Ответ: -1.5
Объяснение:
0.9(4а+3b)-6(0.2a+0.9b)=
=0,9(4×2+3×(-3))-6(0,2×2+0,9×(-3))=
=0.9(8+(-9))-6(0,4+(-2,7))=
=7.2-8.1-2.4+16.2=
=-1.5
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Ответ: -1.5
Объяснение:
0.9(4а+3b)-6(0.2a+0.9b)=
=0,9(4×2+3×(-3))-6(0,2×2+0,9×(-3))=
=0.9(8+(-9))-6(0,4+(-2,7))=
=7.2-8.1-2.4+16.2=
=-1.5