Question

Solve the following quadratic function

by utilizing the square root method.
y = 25x2 - 100
x = +[?]

Answer 1

x = ±√(y/25 + 4)

Explanation:

Given the expression;

y = 25x² - 100

We are to make x the subject of the formula;

-25x² = -y - 100

25x²= y + 100

x² = y/25 + 100/25

x²= y/25 + 4

x = ±√(y/25 + 4)

This give the value of x