श्रीधर आचार्य फार्मूला ✍️ | द्विघात समीकरण के मूल | Quadratic Equation || NCERT | #maths #class10
17श्रीधर आचार्य फार्मूला ✍️ | द्विघात समीकरण के मूल | Quadratic Equation || NCERT #maths #class10
QUICKER Maths This is an education channel, in which the problems of students related to maths are solved.
In algebra, a quadratic equation (from Latin quadratus 'square') is any equation that can be rearranged in standard form as[1]
{\displaystyle ax^{2}+bx+c=0\,,}
{\displaystyle ax^{2}+bx+c=0\,,}
where x represents an unknown value, and a, b, and c represent known numbers, where a ≠ 0. (If a = 0 and b ≠ 0 then the equation is linear, not quadratic.) The numbers a, b, and c are the coefficients of the equation and may be distinguished by respectively calling them, the quadratic coefficient, the linear coefficient and the constant coefficient or free term.[2]
The values of x that satisfy the equation are called solutions of the equation, and roots or zeros of the expression on its left-hand side. A quadratic equation has at most two solutions. If there is only one solution, one says that it is a double root. If all the coefficients are real numbers, there are either two real solutions, or a single real double root, or two complex solutions that are complex conjugates of each other. A quadratic equation always has two roots, if complex roots are included; and a double root is counted for two. A quadratic equation can be factored into an equivalent equation[3]
{\displaystyle ax^{2}+bx+c=a(x-r)(x-s)=0}
{\displaystyle ax^{2}+bx+c=a(x-r)(x-s)=0}
where r and s are the solutions for x.
The quadratic formula
{\displaystyle x={\frac {-b\pm {\sqrt {b^{2}-4ac}}}{2a}}}
{\displaystyle x={\frac {-b\pm {\sqrt {b^{2}-4ac}}}{2a}}}
expresses the solutions in terms of a, b, and c. Completing the square is one of several ways for deriving the formula.
Solutions to problems that can be expressed in terms of quadratic equations were known as early as 2000 BC.[4][5]
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