Sunita claims x = -3 is a root of 2x^2 + 5x - 3 = 0. Substituting x = -3 into the left side gives:

Question

Accepted Answer

0, so -3 is a root. 2(-3)^2 + 5(-3) - 3 = 2(9) - 15 - 3 = 18 - 18 = 0. The value is 0, so x = -3 really is a root. (The other root, from the formula, is 1/2.)

Sunita claims $x = - 3$ is a root of $2 x^{2} + 5 x - 3 = 0$ .
Substituting $x = - 3$ into the left side gives:

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 10 The Quadratic Formula practice

Sunita claims x=−3 is a root of 2x2+5x−3=0.Substituting x=−3 into the left side gives:

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 10 The Quadratic Formula practice

Sunita claims $x = - 3$ is a root of $2 x^{2} + 5 x - 3 = 0$ .
Substituting $x = - 3$ into the left side gives: