Week 4: Student Discussion and Response
Tyler DickersonWednesdayAug 9 at 8:07pm
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Good evening everyone,
I was assign the number 7 and my problems are as follows:
7)
x^2+6x-27=0
To factor this problem, I have to figure out what numbers multiply together to get -27 and add to get 6. The two numbers are -3 and 9! -3*9=-21 and 9-3=6
So, (x-3) and (x+9)
(x-3)(x+9)=0
x-3=0, x+9=0
I have completed the square
x= -3,9
14)
The quadratic formula: ax^2+bx+c=0 has to be use in my next problem
a^2=32 (a with the square root of two, equals thirty-two.
I have to simplify the square root of thirty two.
The square root of thirty-two is four square root of two.
Considering the four with the square root of two cannot be simplified further...
The answer is: a= 42,−42
Words: Four square root two, negative four with the square root of two
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