Question

Write the quadratic equation whose roots are 1 and -1, and whose leading coefficient is 4

Answer 1

y = 4x² - 4

Explanation:

y = a(x - x₁ )(x - x₂)

Plug in the knowns

y = 4(x - 1)(x + 1)

expand

y = 4(x² - 1)

y = 4x² - 4