Q. Solve the equation x2−x−11=−2x to the nearest tenth.Answer: x=
Simplify the equation: First, we need to simplify the equation by moving all terms to one side to set the equation to zero.x2−x−11=−2xAdd 2x to both sides to combine like terms.x2−x+2x−11=0x2+x−11=0
Quadratic formula setup: Now, we have a quadratic equation in the form ax2+bx+c=0. We can solve for x using the quadratic formula, x=2a−b±b2−4ac, where a=1, b=1, and c=−11. First, calculate the discriminant (b2−4ac). Discriminant = (1)2−4(1)(−11) Discriminant = 1+44 Discriminant = 45
Calculate discriminant: Since the discriminant is positive, we have two real solutions. Now, we will use the quadratic formula to find the solutions.x=2⋅1−1±45x=2−1±45
Use quadratic formula: Calculate the two solutions using the quadratic formula.First solution:x=2−1+45x=2−1+6.708x=25.708x=2.854Round to the nearest tenth: x≈2.9Second solution:x=2−1−45x=2−1−6.708x=2−7.708x=−3.854Round to the nearest tenth: x≈−3.9
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