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Solve y2 = 15y − 56 using the quadratic formula.
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Solve y2 = 15y − 56 using the quadratic formula.
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Mar 7, 2017
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Solve y2 = 15y − 56 using the quadratic formula.
Mathematics
high-school
Anbin Muniandy
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Anbin Muniandy
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The solution is
7 and 8
.
Romo
answered
Mar 8, 2017
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Romo
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4
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y^2= 15y -56
⇒ y^2 -15y+ 56= 0
⇒ y= \frac{-(-15)+ \sqrt{(-15)^2-4(1)(56)} }{2*1}
or y= \frac{-(-15)- \sqrt{(-15)^2-4(1)(56)} }{2*1}
⇒ y= 8 or y= 7
The final answer is y= 8 or y= 7
~
Mehmet Guloglu
answered
Mar 11, 2017
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Mehmet Guloglu
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