The quadratic equation with roots –1 and 4 is

2023

The quadratic equation with roots –1 and 4 is

  1. A.

    x2−3x−4=0

  2. B.

    x2+3x+3=0

  3. C.

    x2−4x+1=0

  4. D.

    More than one of the above

  5. E.

    None of the above

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Correct answer: A

To find the quadratic equation with given roots, use the fact that for roots α and β, the equation is x² - (α+β)x + αβ = 0.

Here, the roots are -1 and 4.

Sum of roots = -1 + 4 = 3

Product of roots = (-1) × 4 = -4

So, the quadratic equation is x² - 3x - 4 = 0.

This matches option A.

हिन्दी उत्तर:

द्विघात समीकरण के मूल दिए गए हैं, तो वह समीकरण x² - (मूलों का योग)x + (मूलों का गुणनफल) = 0 के रूप में होता है।

यहाँ मूल -1 और 4 हैं।

मूलों का योग = -1 + 4 = 3

मूलों का गुणनफल = (-1) × 4 = -4

इसलिए, द्विघात समीकरण x² - 3x - 4 = 0 है।

यह विकल्प A से मेल खाता है।

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