This mathematics problem involves applying core mathematical principles and formulas. Below you will find a complete step-by-step solution with detailed explanations for each step, helping you understand not just the answer but the method behind it.
ScanSolve AI Answer
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Step 1: Identify the given roots and the general form of the quadratic equation.
The given quadratic equation is $x^2 + bx + c = 0$.
The roots are $x_1 = \frac{-7+\sqrt{61}}{2}$ and $x_2 = \frac{-7-\sqrt{61}}{2}$.
For a quadratic equation $ax^2 + bx + c = 0$, the sum of the roots is $x_1 + x_2 = -\frac{b}{a}$ and the product of the roots is $x_1 \cdot x_2 = \frac{c}{a}$.
In this case, $a=1$.
Step 2: Calculate the sum of the roots to find the value of $b$.
$$x_1 + x_2 = \frac{-7+\sqrt{61}}{2} + \frac{-7-\sqrt{61}}{2}$$
$$x_1 + x_2 = \frac{-7+\sqrt{61} - 7 - \sqrt{61}}{2}$$
$$x_1 + x_2 = \frac{-14}{2}$$
$$x_1 + x_2 = -7$$
Since $x_1 + x_2 = -\frac{b}{a}$ and $a=1$:
$$-7 = -b$$
$$b = 7$$
Step 3: Calculate the product of the roots to find the value of $c$.
$$x_1 \cdot x_2 = \left(\frac{-7+\sqrt{61}}{2}\right) \cdot \left(\frac{-7-\sqrt{61}}{2}\right)$$
This is in the form $(A+B)(A-B) = A^2 - B^2$, where $A = -7$ and $B = \sqrt{61}$.
$$x_1 \cdot x_2 = \frac{(-7)^2 - (\sqrt{61})^2}{2 \cdot 2}$$
$$x_1 \cdot x_2 = \frac{49 - 61}{4}$$
$$x_1 \cdot x_2 = \frac{-12}{4}$$
$$x_1 \cdot x_2 = -3$$
Since $x_1 \cdot x_2 = \frac{c}{a}$ and $a=1$:
$$-3 = c$$
The values are $b=7$ and $c=-3$.
The final answer is $\boxed{b=7, c=-3}$.
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Identify the given roots and the general form of the quadratic equation.
|Mathematics
Identify the given roots and the general form of the quadratic equation.
ScanSolve AI Answer
Right, let's go.
Step 1: Identify the given roots and the general form of the quadratic equation.
The given quadratic equation is x2+bx+c=0.
The roots are x1=2−7+61 and x2=2−7−61.
For a quadratic equation ax2+bx+c=0, the sum of the roots is x1+x2=−ab and the product of the roots is x1⋅x2=ac.
In this case, a=1.
Step 2: Calculate the sum of the roots to find the value of b.
x1+x2=2−7+61+2−7−61x1+x2=2−7+61−7−61x1+x2=2−14x1+x2=−7
Since x1+x2=−ab and a=1:
−7=−bb=7
Step 3: Calculate the product of the roots to find the value of c.
x1⋅x2=(2−7+61)⋅(2−7−61)
This is in the form (A+B)(A−B)=A2−B2, where A=−7 and B=61.
x1⋅x2=2⋅2(−7)2−(61)2x1⋅x2=449−61x1⋅x2=4−12x1⋅x2=−3
Since x1⋅x2=ac and a=1:
−3=c
The values are b=7 and c=−3.
The final answer is b=7,c=−3.
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