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8x(ax2-4x4)+9x9-12x1-1=100

Răspuns :

Răspuns:

Salutare!

8×(a×2-4×4)+9×9-12×1-1=100

8×(a×2-16)+81-12-1=100

8×(a×2-16)+81-12=100+1

8×(a×2-16)+81-12=101

8×(a×2-16)+81=101+12

8×(a×2-16)+81=113

8×(a×2-16)=113-81

8×(a×2-16)=32

(a×2-16)=32:8

(a×2-16)=4

a×2=4+16

a×2=20

a=20:2

a=10

#Succes!