If b 2 - 4ac = 0, then the quadratic equation has two equal real roots.If b 2 - 4ac > 0, then the quadratic equation has two distinct real roots.Based on the value of the determinant, the three types of roots are given below. ![]() In the above expression, the value b 2 - 4ac is called the discriminant and is useful to find the nature of the roots of the given equation. The below formula is helpful to quickly find the values of the variable x with the least number of steps. The first method is to solve the quadratic equation by the algebraic method, and the second method is to solve it through the use of the quadratic formula. The general form of the quadratic equation is ax 2 + bx + c = 0, and there are two methods of solving this quadratic equation. Take a look at the figure below:Īn important algebra formula introduced in class 10 is the “ quadratic formula”. These exponential laws are further useful to derive some of the logarithmic laws.Įach of these laws has a specific name. The higher exponential values can be easily solved without any expansion of the exponential terms. Some of the common laws of exponents with the same bases having different powers, and different bases having the same power, are useful to solve complex exponential terms. The algebra formulas for three variables a, b, and c and for a maximum degree of 3 can be easily derived by multiplying the expression by itself, based on the exponent value of the algebraic expression. In the same way, by using squares and rectangles, we can prove the other algebraic identities as well. ![]() Further, we can consolidate the proof of the identity (a + b) 2= a 2 + 2ab + b 2. This expression can be geometrically understood as the area of the four sub-figures of the below-given square diagram. As proof of this formula, let us try to multiply algebraically the expression and try to find the formula. Let us look at the algebraic identity: (a + b) 2 = a 2 + 2ab + b 2, and try to understand this identity in algebra and also in geometry. Here are some most commonly used algebraic identities: Algebraic Identities Formula Algebraic identities find applications in solving the values of unknown variables. Algebraic Identity means that the left-hand side of the equation is identical to the right-hand side of the equation, and for all values of the variables. In algebra formulas, an identity is an equation that is always true regardless of the values assigned to the variables. Here, we shall look into the list of all algebraic formulas used across the different math topics. Topics like logarithms, indices, exponents, progressions, permutations, and combinations have their own set of algebraic formulas. The algebraic expression formulas are used to simplify the algebraic expressions.īased on the complexity of the math topics, the algebraic formulas have also been transformed. ![]() The algebra formulas are helpful to perform complex calculations in the least time and with fewer steps. Topics like equations, quadratic equations, polynomials, coordinate geometry, calculus, trigonometry, and probability, extensively depend on algebra formulas for understanding and for solving complex problems. Algebra Formulas form the foundation of numerous topics of mathematics.
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