Quadratic formula
Which of the following is considered a quadratic equation?
X³ – 3 x + 1 = 0
3 x² + 2 x = 0
4 x – 17 = 0
Which of the following correctly solves the equation x² – 3x = 18?
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If x² – 16x + 64 = 0, then x =
-8 or 8
8
-8
If y² – 49 = 0, then y =
7 or -7
7
-7
If 2w² = 56 – 6w, then w =
�28 or 2
�7 or 4
�2 or 4
If 2y² = –5y + 12, then y =
-3/2 or -4
-3/2 or 4
3/2 or -4
If 3x² + 4x – 4 = 2x²+ 13x + 18, then x =
-7/5 or -2
11 or -2
Cannot be solved using factoring
Which of the following was correctly solved by using the completing the square process?
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If ax 2 + bx + c = 0, then which correctly states the possible values for x?
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When will a quadratic equation have two different real roots?
When the discriminant is positive
When the discriminant is negative
Zero
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