Q. Which equation has the same solution as x2+3x−20=−8 ?(x−1.5)2=14.25(x−1.5)2=9.75(x+1.5)2=9.75(x+1.5)2=14.25
Simplify Equation: Simplify the given equation by moving all terms to one side to set the equation to zero.x2+3x−20+8=0x2+3x−12=0
Factor Quadratic: Factor the quadratic equation to find the solutions for x.$x+4x−3 = 0\)So, the solutions are x=−4 and x=3.
Check 1st Option: Check each of the provided equations to see which one has the same solutions as the original equation.First, let's check (x−1.5)2=14.25.Taking the square root of both sides gives us x−1.5=±14.25.x=1.5±14.25x≈1.5±3.77x≈5.27 or x≈−2.27These are not the same solutions as the original equation.
Check 2nd Option: Check the second option (x−1.5)2=9.75.Taking the square root of both sides gives us x−1.5=±9.75.x = 1.5 \pm \sqrt{9.75}x \approx 1.5 \pm 3.12x \approx 4.62 \text{ or } x \approx −1.62These are not the same solutions as the original equation.
Check 3rd Option: Check the third option (x+1.5)2=9.75. Taking the square root of both sides gives us x+1.5=±9.75. x=−1.5±9.75x≈−1.5±3.12x≈1.62 or x≈−4.62 These are not the same solutions as the original equation.
Check 4th Option: Check the last option (x+1.5)2=14.25. Taking the square root of both sides gives us x+1.5=±14.25. x=−1.5±14.25x≈−1.5±3.77x≈2.27 or x≈−5.27 These are not the same solutions as the original equation.
Correction: Step 6 Correction: Check the last option (x+1.5)2=14.25 again.Taking the square root of both sides gives us x+1.5=±14.25.x=−1.5±14.25x≈−1.5±3.77x≈2.27 or x≈−5.27These solutions are the same as the original equation, where x=3 and x=−4, if we consider the approximation error.