Special products for mental calculation

Example — Practical application

$(2{,}3)^2 = (2+0{,}3)^2 = 4 + 1{,}2 + 0{,}09 = 5{,}29 \; ✓$ The special-product formulas are also useful for mental calculation: by breaking the number down into a convenient sum, you apply the square of a binomial.

Links

Topics: Algebraic calculus
Concepts: Special products · Square of a binomial
Skills: Calculating · Estimating