Mathematics, 16.07.2019 14:30 harkey
Solve 2x^2 + 12x = 10. a) -3 +- square root of 14 b) -3 +- 2 of square root of 2 c) -3 +- square root of 19 d) -3 +- square root of 29
Answers: 1
.ย I am going to factor out the common 2 to make the numbers a bit smaller for when i put them into the quadratic formula. 
with a=1, b=6, c=-5.ย Put that into the quadratic formula to get 
and 
which simplifies even further to 
.ย If we simplify that radical it will simplify to 
.ย We can pull the perfect square of 4 out as a 2, leaving us with 
.ย So altogether we have 
.ย The 2 in the denominator will reduce with the other integers (not the radicand!) to give us this as our final 
, choice A from above.
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Solve 2x^2 + 12x = 10. a) -3 +- square root of 14 b) -3 +- 2 of square root of 2 c) -3 +- square roo...
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