Помогите 7.4 7.5 по алгебре

Question

Помогите 7.4 7.5 по алгебре

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Answer 1

7.4

1) x1.2= (6+-√36-32)/2 = (6+-2)/2

x1 = 4; x2 = 2;

2) x1.2= (12+-√144-44)/2 = (12+-10)/2

x1 = 11; x2= 1;

3) y1.2= (8+-√64-48)/6 = (8+-4)/6

y1 = 2; y2 = 2/3;

4) y1.2= (-9+-√81-80)/18 = (-9+-1)/18

y1 = -10/18 = -5/9

y2 = -8/18 = -4/9

7.5

1) x1.2= (14+-√196+128)/2 = (14+-18)/2

x1 = 16; x2 = -2;

2) x1.2 = (12+-√144-140)/10 = (12+-2)/10

x1 = 1.4; x2 = 1

3) x1.2 = (-1+-√1+121)/-4 = (1+-11)/4

x1 = 3; x2 = 2.5;

4) x1.2 = (1+-√1+528)/8 = (1+-23)/8

x1 = 3; x2 = 2.75