Question

Check whether –2 and 2 are the zeroes of the polynomial
$x { }^{2} - 16$
​

Answer 1

Answer:

Simplify: \frac{-20-5}{10}.

If you missed this problem, review (Figure).

Simplify: 4+\sqrt{121}.

If you missed this problem, review (Figure).

Simplify: \sqrt{128}.

If you missed this problem, review (Figure).

When we solved quadratic equations in the last section by completing the square, we took the same steps every time. By the end of the exercise set, you may have been wondering ‘isn’t there an easier way to do this?’ The answer is ‘yes.’ In this section, we will derive and use a formula to find the solution of a quadratic equation.