16х²-9-(36х²-12х+1)+18=0
16х²-36х²+12х-1-9+18=0
-20х²+12х+8=0 |÷(-4)
5х²-3х-2=0
D=9+40=49.
x1=(3-7):10=-4:10=-0,4
x2=(3+7):10=1
Ответ:-0,4;1.
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16х²-9-(36х²-12х+1)+18=0
16х²-36х²+12х-1-9+18=0
-20х²+12х+8=0 |÷(-4)
5х²-3х-2=0
D=9+40=49.
x1=(3-7):10=-4:10=-0,4
x2=(3+7):10=1
Ответ:-0,4;1.