Answer:
x² - 3x - 7 = 0
Explanation:
To write a quadratic equation with given roots, use this:
x² - (x1 + x2)x + (x1.x2) = 0
or
x² - (sum of roots)x + (product of roots) = 0
So substitute the given with sum of 3 and product of -7.
x² - (3)x + (-7) = 0 (simplify)
x² - 3x - 7 = 0