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If the difference of the roots of the equation $x^2 - 2kx + 3k = 0$ is 4, then find the value of k.

B. 4, - 1
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The quadratic equation whose roots are twice the roots of $2x^2 - 5x + 2 = 0$ is :

B. $X^2 - 5X + 4 = 0$
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If the ratio of the roots of the equation $x^2 + 6x + k - 5 = 0$ is 3:5, then find the value of k.

C. $55/16$
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A quadratic equation has roots 3 and 4. What is the quadratic equation in standard form?

A. X² - 7X + 12 = 0
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If the quadratic equation ax^2 + bx + c = 0 has roots r1 and r2, which of the following is true?

A. R1 + R2 = -B/A
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