Q. Solve the equation 2x2+8x−10=−3x2 to the nearest tenth.Answer: x=
Move Terms to One Side: First, we need to move all terms to one side of the equation to set it equal to zero. We do this by adding 3x2 to both sides of the equation.2x2+8x−10+3x2=−3x2+3x2This simplifies to:5x2+8x−10=0
Solve Quadratic Equation: Next, we need to solve the quadratic equation. We can do this by using the quadratic formula, which is x=2a−b±b2−4ac, where a=5, b=8, and c=−10.
Calculate Discriminant: Now we calculate the discriminant, which is the part under the square root in the quadratic formula: b2−4ac.Discriminant = 82−4(5)(−10)Discriminant = 64+200Discriminant = 264
Find Real Solutions: Since the discriminant is positive, we have two real solutions. We will use the quadratic formula to find both.x=2×5−8±264x=10−8±264
Simplify Square Root: We simplify the square root of 264 to get an approximate decimal value for the square root.264≈16.2 (rounded to one decimal place)
Substitute and Solve: Now we substitute the approximate value of the square root back into the quadratic formula to find the two solutions.x=10−8+16.2 and x=10−8−16.2x≈0.82 and x≈−2.42 (rounded to the nearest tenth)
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