JA1
  • JA1
In a quadratic formula, when you have:
Mathematics
  • Stacey Warren - Expert brainly.com
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jamiebookeater
  • jamiebookeater
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JA1
  • JA1
\[b ^{2} - 4ac \]
JA1
  • JA1
Would you subtract B and 4ac?
dumbcow
  • dumbcow
that is called the discriminant

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JA1
  • JA1
Like this: -49 - 16
JA1
  • JA1
Would you end up having 33 or 65?
JA1
  • JA1
Really? Good to know since I usually am bad with terminology hehe
anonymous
  • anonymous
Its called the discriminant and its used to determine the number and type of zeros of a quadratic function
JA1
  • JA1
Yes but would you end up with -33 or -65?
dumbcow
  • dumbcow
give me some context ... what a,b,c are you working with
JA1
  • JA1
A = 1 B = -7 C = 4
dumbcow
  • dumbcow
ok its 33 then \[(-7)^{2} -4(1)(4) = 49 -16 = 33\] remember anything squared is always positive
JA1
  • JA1
OHHHHHHH I was so confused in the lesson, I forgot about that rule thank you so much you saved me much trouble in the future.
dumbcow
  • dumbcow
no problem...it might help when you plug the numbers into formula to use parenthesis so you remember to square the neg

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