Before using the formula, Farhan guesses that x = 3 satisfies x^2 - 7x + 10 = 0. Substituting x = 3 gives:

Question

Accepted Answer

-2, so 3 is not a root; the actual roots are 2 and 5. 3^2 - 7(3) + 10 = 9 - 21 + 10 = -2, which is not 0, so 3 is not a root. By the formula, D = 49 - 40 = 9 and x = 7 ± 3/2 = 5 or 2.

Before using the formula, Farhan guesses that $x = 3$ satisfies $x^{2} - 7 x + 10 = 0$ .
Substituting $x = 3$ gives:

Step-by-Step Solution

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More Class 10 The Quadratic Formula practice

Before using the formula, Farhan guesses that x=3 satisfies x2−7x+10=0.Substituting x=3 gives:

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 10 The Quadratic Formula practice

Before using the formula, Farhan guesses that $x = 3$ satisfies $x^{2} - 7 x + 10 = 0$ .
Substituting $x = 3$ gives: