Q. Which equation has the same solution as x2+x−11=−7 ?(x−0.5)2=3.75(x+0.5)2=4.25(x+0.5)2=3.75(x−0.5)2=4.25
Simplify the Equation: First, we need to simplify the given equation x2+x−11=−7 by adding 7 to both sides to isolate the x terms on one side.x2+x−11+7=−7+7x2+x−4=0
Check First Option: Now, we need to determine which of the provided equations, when simplified or expanded, will result in the same quadratic equation as x2+x−4=0. Let's start with the first option: (x−0.5)2=3.75. Expanding (x−0.5)2 gives us: (x−0.5)(x−0.5)=x2−x+0.25 This does not match our simplified equation x2+x−4.
Check Second Option: Next, let's consider the second option: x + 0.5)^2 = 4.25\. Expanding \$x + 0.5)^2 gives us: \$x + 0.5)(x + 0.5) = x^2 + x + 0.25\ This also does not match our simplified equation \$x^2 + x - 4.
Check Third Option: Now, let's look at the third option: (x+0.5)2=3.75.Expanding (x+0.5)2 gives us:(x+0.5)(x+0.5)=x2+x+0.25To match our simplified equation x2+x−4, we need to see if 0.25 is equal to 3.75 when we move it to the other side of the equation.x2+x+0.25−0.25=3.75−0.25x2+x=3.5This does not match our simplified equation x2+x−4.
Check Fourth Option: Finally, let's examine the fourth option: x−0.5)2=4.25.(Expanding \$x - 0.5)^2 gives us:\ \$x - 0.5)(x - 0.5) = x^2 - x + 0.25(\newline\)To match our simplified equation \$x^2 + x - 4\), we need to see if \(0.25\) is equal to \(4.25\) when we move it to the other side of the equation.(\newline\)\(x^2 - x + 0.25 - 0.25 = 4.25 - 0.25\)(\newline\)\(x^2 - x = 4\)(\newline\)This does not match our simplified equation \(x^2 + x - 4\) either.
Reevaluate Third Option: It seems that none of the provided options exactly match the simplified equation \(x^2 + x - 4 = 0\). However, we may have made a mistake in our calculations. Let's recheck the third option: \((x + 0.5)^2 = 3.75\).\(\newline\)Expanding \((x + 0.5)^2\) gives us:\(\newline\)\((x + 0.5)(x + 0.5) = x^2 + x + 0.25\)\(\newline\)Now, subtracting \(0.25\) from both sides to match our simplified equation:\(\newline\)\(x^2 + x + 0.25 - 0.25 = 3.75 - 0.25\)\(\newline\)\(x^2 + x = 3.5\)\(\newline\)This is incorrect, as we need the constant term to be \(-4\), not \(3.5\). Therefore, there is a math error in our previous step.
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