# Equations Reducible to Quadratic by Substitution | Learn Math

Equations Reducible to Quadratic by Substitution to Learn Math is made the equations easy to solve by substitution to simplify the equations.

## Practice Questions for Equations Reducible to Quadratic by Substitution | Learn Math

### Question 1

Solve $(x+2)^2 – 3(x+2) – 4 = 0$.

### Question 2

Solve $(x-1)^4 – 11(x-1)^2 + 18 = 0$.

### Question 3

Solve $(x^2-x)^2 – 18(x^2-x) + 72 = 0$.

### Question 4

Solve $\displaystyle \Big(x+\frac{1}{x}\Big)^2 + \Big(x+\frac{1}{x}\Big) – 2 = 0$.