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determina x pentru care:a)12x+x2=177;b)1x3+3x=188

Răspuns :

1x3+3x=188
3x+3x=188
6x=188
x=94/3





12x+x2=177
12x+2x=177
14x=177
x=177/14


1. 12x+2x=117
12+2=14
14x=117
x=177/14 --- fractie

2. 1x3+3x=188
3x+3x=6x=188
x=31(3)
x=94/3 --- fractie