The Value Of X Is 15x^2+52x−320
Well, sum means addition, so I'm gonna add together 52 and 20.
52
20 +
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I start at the ones, and see that 2 + 0 is 2, so drop a 2 below them
52
20 +
--------
2
now, look at the tens place. we add together what we see in the tens place and put it below. 5+2 is 7, so we put that under 5 and 2.
52
20 +
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72 we see that our final answer is 72, so the sum of 52 and 20 is 72.
answer:
x=0 or x=4.732050807568877 or x=1.2679491924311228
Answer:

Step-by-step explanation:
=> 
Dividing both sides by -4
=> 
=> 