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Marizza181 [45]
3 years ago
15

24 - 3 1/3 please help!!

Mathematics
2 answers:
strojnjashka [21]3 years ago
7 0
20 and 2/3 is correct, I think
Talja [164]3 years ago
3 0
20 and 2/3 I think is correct
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PLEASE HELP ME NOW URGENT
timama [110]

ANSWER

y   = 3 \pm \sqrt{21}

EXPLANATION

The quadratic equation is:

{y}^{2}  - 6y - 12 = 0

Group variable terms:

{y}^{2}  - 6y = 12

Add the square of half, the coefficient of y to both sides.

{y}^{2}  - 6y  + ( - 3) ^{2} = 12 + ( - 3) ^{2}

{y}^{2}  - 6y  + 9= 12 + 9

The LHS us now a perfect square trinomial:

{(y - 3)}^{2}= 21

Take square root:

y - 3 =  \pm \sqrt{21}

y = 3 \pm \sqrt{21}

The first choice is correct.

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3 years ago
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Part A:
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