Question

The zeros of a quadratic function are -8 and 5. Write the quadratic function in Standard Form.

Answer 1

y = x² + 3x - 40

Explanation:

Given the zeros are x = - 8 and x = 5, then the factors are

(x + 8) and (x - 5) and

y = (x + 8)(x - 5) ← expand factors

y = x² - 5x + 8x - 40, hence

y = x² + 3x - 40 ← in standard form