Write a quadratic function f whose zeros are -2 and -7

Answer 1

f(x) = (x+2)(x+7)

When set to 0, 0 = (x+2)(x+7)

Set each factor = 0 and solve

x = -2, -7

Answer 2

f(x) = [x - (-2)][x - (-7)] = (x + 2)(x + 7) = x² + 9x + 14