Question

Need help with this math question! (4x+2)^2-(x-1)^2

Answer 1

Keep these rules in mind.

• (a + b)² = a² + 2ab + b²
• (a - b)² = a² - 2ab + b²

Firstly, solve the exponents:

`16x^2+16x+4-(x^2-2x+1)`

Next, foil -(x^2 - 2x + 1) (Think of the outer minus sign as -1):

`16x^2+16x+4-x^2+2x-1`

Lastly, combine like terms and your answer will be:

`15x^2+18x+3`