Q. Discuss the nature of the roots of the quadratic equation (a2+b2)x2−3(a−b)x+29=0,a+b=0
Identify coefficients: Identify the coefficients of the quadratic equation.The quadratic equation is given by (a2+b2)x2−3(a−b)x+29=0. We can compare this with the standard form ax2+bx+c=0 to find the coefficients.Here, a=a2+b2, b=−3(a−b), and c=29.
Calculate discriminant: Calculate the discriminant of the quadratic equation.The discriminant of a quadratic equation ax2+bx+c=0 is given by D=b2−4ac. We will calculate the discriminant for our equation using the identified coefficients.D=(−3(a−b))2−4(a2+b2)(29)
Simplify discriminant: Simplify the discriminant. D=9(a−b)2−4(a2+b2)(29)D=9(a2−2ab+b2)−2(2a2+2b2)(9)D=9a2−18ab+9b2−18a2−18b2D=−9a2+18ab−9b2
Factor common term: Factor out the common term.D=−9(a2−2ab+b2)D=−9(a−b)2
Analyze roots: Analyze the discriminant to discuss the nature of the roots.Since D=−9(a−b)2 and a square is always non-negative, (a−b)2≥0. Therefore, D≤0.If D < 0, the quadratic equation has two complex roots.If D=0, the quadratic equation has one real repeated root.Since we have D=−9(a−b)2 and it is given that a+b=0, which does not affect the sign of D, we can conclude that D < 0.
Conclude root nature: Conclude the nature of the roots based on the discriminant.Because D < 0, the roots of the quadratic equation are complex and not real. They will be in the form of a+bi and a−bi, where i is the imaginary unit.
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