(a + b)3 = a3 + 3a2b + 3ab2 + b3
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that;s so simple . try it
Binomial Expansion makes it easier to solve an equation. It brings an equation of something raised to a power down to a solveable equation without parentheses.
The cube of a binomial is the cube of two terms separated by an addition or subtraction sign, such as (2a + 3b) or (ab - cd).For example, (2x - 5y)3 = 8x3 - 40x2y + 50xy2 - 20x2y + 100xy2 - 125y3.The detailed method of expanding this binomial is : (2x - 5y)3 = (2x - 5y)(2x - 5y)(2x - 5y) = (4x2 - 20xy + 25y2)(2x - 5y) = 8x3 - 40x2y + 50xy2 - 20x2y + 100xy2 - 125y3
To solve something you need an equation (or inequality). An equation comprises two expressions with an equality sign between them. Here, there is only one expression: the "square of binomial". So, you cannot solve it.You expand the expression as follows:(ax + b)^2 = a^2x^2 + 2abx + b^2