Use any method to solve the equation. if necessary, round to the nearest hundredth.9x2  − 21 = 0 4.58, –4.58 3, –3 0.65, –0.65 1.53, –1.53

Step-by-step explanation:

The given quadratic equation is

To solve this equation, we just have to isolate the variable, because the quadratic expression has only one variable, the linear term is not present. So

Now, we apply a square root, to have the variable complete isolated

Remember that all square roots have two results, one positive and one negative.

Therefore, the solutions for this equation are

step-by-step explanation:

the multiplicative inverse of a fraction a/b is b/a. for the multiplicative inverse of a real number, divide 1 by the number. for example, the reciprocal of 5 is one fifth 1/5 or 0.2, and the reciprocal of 0.25 is 1 divided by 0.25, or 4.