Answer:
Step-by-step explanation:
So we have the equation:
Let's let u be equal to x². So:
Factor:
Zero Product Property:
Subtract:
Replace:
Take square root:
Simplify:
Look at attached photo
first divide each line into the number as shown in the denominator
Let x = hours to meet
train one has a 2 hour head start or 210 km head start
210 + 105x = 135x
30x = 210
x = 7 hours to meet
This is your answer
<span>-12 - 5 (first one)
hope that helps
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