A student solving 2x^2 - 7x + 3 = 0 writes x = 7 ± √49 + 244. Which correction is required?

Question

Accepted Answer

4ac must be subtracted: D = 49 - 24 = 25, giving 3 and 1/2. The discriminant is b^2 - 4ac, and here c is positive, so D = 49 - 4(2)(3) = 49 - 24 = 25, not 73. √D = 5 and x = 7 ± 5/4 = 3 or 1/2. The -b = 7 and the 2a = 4 were both fine.

A student solving $2 x^{2} - 7 x + 3 = 0$ writes $x = \frac{7 \pm 49 + 24}{4}$ .
Which correction is required?

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More Class 10 The Quadratic Formula practice

A student solving 2x2−7x+3=0 writes x=47±49+24​​.Which correction is required?

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 10 The Quadratic Formula practice

A student solving $2 x^{2} - 7 x + 3 = 0$ writes $x = \frac{7 \pm 49 + 24}{4}$ .
Which correction is required?