How do I find t in 2x^2−4x=t, math homework help

Anonymous
timer Asked: Dec 28th, 2016
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Question description

2x^2 − 4x = t

In the equation above, t is a constant. If the equation has no real solutions, which of the following could be the value of t ?

a) -3

b) -1

c) 1

d) 3


I already know the correct answer to the question is A, but I don't have any idea how to find that answer. Can you explain the math I would use to arrive at that answer? This question is from SAT 6 from the College Board, section 3 question 13.

Tutor Answer

vmohanakumar
School: UT Austin

Attached. Let me know if you have any questions.

2x^2 − 4x = t
In the equation above, t is a constant. If the equation has no real solutions, which of the following could be the
value of t ?
a) -3
b) -1
c) 1
d) 3

We know that a quadratic equation in the standard form 𝑎𝑥 2 + 𝑏𝑥 + 𝑐 = 0, will not have any real
solutions if the discrimi...

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Anonymous
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