Q. 2x+3y=−83y2−8y=2x+10If (x1,y1) and (x2,y2) are distinct solutions to the system of equations shown, what is the product of the x1 and x2 ?
Express x in terms of y: Given the system of equations:1) 2x+3y=−82) 3y2−8y=2x+10We need to find the product of the x-coordinates of the distinct solutions to these equations.First, let's express x from the first equation in terms of y.2x=−8−3yx=2−8−3y
Substitute x into second equation: Now, substitute the expression for x from the first equation into the second equation.3y2−8y=2((−8−3y)/2)+10Simplify the equation.3y2−8y=−8−3y+103y2−8y=2−3y
Set equation to zero: Next, move all terms to one side to set the equation to zero. 3y2−8y+3y−2=0Combine like terms.3y2−5y−2=0
Solve quadratic equation for y: Now, we need to solve the quadratic equation for y. To find the roots of the quadratic equation, we can use the quadratic formula, y=2a−b±b2−4ac, where a=3, b=−5, and c=−2. Let's calculate the discriminant b2−4ac first. Discriminant = (−5)2−4(3)(−2) Discriminant = 25+24 Discriminant = 49
Calculate discriminant: Since the discriminant is positive, we have two distinct real solutions for y.Now, let's find the two solutions for y using the quadratic formula.y1,2=2×35±49y1,2=65±7We have two solutions for y:y1=65+7y1=612y1=2y2=65−7y2=6−2y0
Find solutions for y: Now that we have the values for y1 and y2, we can find the corresponding x-values using the expression for x we found earlier.For y1=2:x1=(−8−3(2))/2x1=(−8−6)/2x1=−14/2x1=−7
Find x values: For y2=−31:x2=(−8−3(−31))/2x2=(−8+1)/2x2=−27
Calculate product of x values: Finally, we find the product of x1 and x2.Product = x1×x2Product = (−7)×(−7/2)Product = 249