Q. Find one value of x that is a solution to the equation:(x2−6)2=−3x2+18x=□
Analyze the system: Analyze the given system of equations.We have a system of equations:1. (x2−6)2=−3x2+182. x=□ or −xWe need to find a value of x that satisfies both equations.
Solve the first equation: Solve the first equation.(x2−6)2=−3x2+18Expand the left side of the equation:x4−12x2+36=−3x2+18Move all terms to one side to set the equation to zero:x4−12x2+3x2−18=0Combine like terms:x4−9x2−18=0This is a quadratic equation in terms of x2.
Factor the quadratic equation: Factor the quadratic equation.x4−9x2−18=0We need to find two numbers that multiply to −18 and add up to −9. The numbers −6 and 3 satisfy these conditions.So we can write the equation as:(x2−6)(x2+3)=0Now we have two separate equations:1. x2−6=02. x2+3=0
Solve the first separate equation: Solve the first separate equation.x2−6=0Add 6 to both sides:x2=6Take the square root of both sides:x=6 or x=−6These are two possible values for x.
Solve the second separate equation: Solve the second separate equation.x2+3=0Subtract 3 from both sides:x2=−3Since the square of a real number cannot be negative, there are no real solutions to this equation.
Check solutions for the second equation: Check which values of x satisfy the second equation of the system.The second equation of the system is x=□ or −x, which means we are looking for a value of x that is either positive or negative.From Step 4, we found two values for x: 6 and −6. Both of these values satisfy the second equation since one is positive and the other is negative.Therefore, we can choose either 6 or −6 as the value of x that satisfies the system of equations.
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