Expand these quadratic expressions [br]which are special products[br][math]\left(a+b\right)^2[/math][br][math]\left(a-b\right)^2[/math] or [size=150][size=100] Note we can also think of [/size][/size] [math]\left(a-b\right)^2[/math] as [math]\left[a+\left(-b\right)\right]^2[/math][br][math]\left(a+b\right)\left(a-b\right)[/math]