Solve using substitution Y=x^2-2x-6 and Y=4x+6
K kevinryans1 New member Joined Feb 1, 2010 Messages 6 Feb 7, 2010 #1 Solve using substitution Y=x^2-2x-6 and Y=4x+6
W wjm11 Senior Member Joined Nov 13, 2004 Messages 1,417 Feb 7, 2010 #2 Solve using substitution Y=x^2-2x-6 and Y=4x+6 Click to expand... Since we know that x^2-2x-6 is equal to y, and 4x+6 is also equal to y, that means they must be equal to each other. Make sense? x^2-2x-6 = 4x+6 Solve for x, then substitute that value back into one of the original equations to find y.
Solve using substitution Y=x^2-2x-6 and Y=4x+6 Click to expand... Since we know that x^2-2x-6 is equal to y, and 4x+6 is also equal to y, that means they must be equal to each other. Make sense? x^2-2x-6 = 4x+6 Solve for x, then substitute that value back into one of the original equations to find y.
