mikaa_toxica13
Check all polynomials that are perfect square trinomials:
49x2 − 8x + 16
4a2 − 20a + 25
25b2 − 5b + 10
16x2 − 8x + 1
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BurrDaBoss
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B .
D .
;)
mikaa_toxica13
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can u explain
BurrDaBoss
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4a² − 20a + 25: discriminant = (-20)² - 4(4)(25) = 0
16x² − 8x + 1: discriminant = (-8)² - 4(16)(1) = 0
The other two aren't these .
BurrDaBoss
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Thanks ! ;)
mikaa_toxica13
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can u help with two more ? i have to put the answers exactly right or i get it wrong
BurrDaBoss
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Sure as long as there not as hard as the other one was . xD
mikaa_toxica13
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Given the following perfect square trinomial, fill in the missing term.
x2 − 16x + ____
mikaa_toxica13
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even if i have the right answer, if i put in one wrong anything anywhere it will be marked as wrong :/
BurrDaBoss
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(x−8)2=x2−16x+64 . How this ?
mikaa_toxica13
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Given the following perfect square trinomial, fill in the missing term. (Do not type the variable in the blank.)
4x2 + ___x + 49
idk ill have to see when i submit it
mikaa_toxica13
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wait is that teh answer itself or equation = answer
BurrDaBoss
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Ummm , I don't know what you mean but , the answer for the first question you asked was 64 .
mikaa_toxica13
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:/ crap. well it came up wrong :( so instead of an A i got a D. i hate those questions
BurrDaBoss
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Noo ! i didn't answer the last one yet . It was 28 .
BurrDaBoss
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Sorry , if I gave you a low grade .
mikaa_toxica13
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yea i figured out the last one lol and its not your fault, its the stupid database
BurrDaBoss
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Well , I'll just give you a medal since I feel guilty .
mikaa_toxica13
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aw well thanks for helping.
BurrDaBoss
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Your Welcome .