How do you solve quadratics by taking square roots ?

Start with the equation

Factor from the first two terms:

Complete the square; do this by adding an appropriate constant to to form a perfect square trinomial. Recall that

So here we have

and we have to add to make the perfect square. But we also have to subtract this same constant to preserve equality:

Now we can take the square root and solve for :

You should recognize this formula...

687.09 dollars       happy now

step-by-step explanation: 6870

1857 times .63 equals 1169.91 subtract that from 1857 you get 687.09

answer: answer is c!

ok i got to organize the

3/15 and 12/55

3*

aha

3*4 equals 12 but not

a: no

b:

8/24 12/35

no

gautie

it's c

5/18 = 25/90

5*5=25

18*5 = 90

hope that you!

one more happy customer!

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step-by-step explanation: